Work in the age of intelligent machines

How do you organise a society in which few people do anything economically productive?

Martin Wolf



As long ago as 1984, in his Paths to Paradise, André Gorz, a self-proclaimed “revolutionary-reformist” stated, baldly, that the “micro-economic revolution heralds the abolition of work”. He even argued that “waged work . . . may cease to be a central preoccupation by the end of the century”. His timing was wrong. But serious analysts think he was directionally right. So what might a world of intelligent machines mean for humanity? Will human beings become as economically irrelevant as horses? If so, what will happen to our individual self-worth and the organisation of our societies?

In a remarkable recent lecture, Adair Turner, former chairman of the UK’s financial regulator and chairman of the Institute for New Economic Thinking, addresses just these questions. He started from the assumption that intelligent machines will ultimately be able to perform most forms of current work better than people and at lower cost. This, he argues, is a question of when, not if. It will happen because of the progressive advance of processing power, the costless replicability of software and the rise of machine learning. Robot gods will make us all redundant.



Drawing on A Future that Works, a report published by the McKinsey Global Institute last year, Lord Turner adds that this future will not come evenly: some will be more affected far sooner than others. Moreover, even if intelligent machines cannot do every aspect of any given job, they can displace a great many workers.

With current technology, predictable physical tasks and collecting and processing of data will be especially vulnerable. By sector, “accommodation and food services”, manufacturing and transportation will be particularly vulnerable. According to a paper by Jason Furman, former chairman of the US Council of Economic Advisers, and Robert Seamans of the Stern School of Business, those who earn less and those with less education are more vulnerable.



Lord Turner argues that what is happening also explains the “productivity paradox” — rapid innovation, but low productivity growth — that I discussed two weeks ago. A big part of the explanation may be a shift from relatively high-paid jobs in sectors with relatively fast productivity growth, such as manufacturing, towards relatively low-paid jobs in sectors with low productivity growth, such as personal care, home health aides and retail sales. Of the 10 US sectors with the biggest forecast growth in employment between 2014 and 2024, which are expected to generate 29 per cent of all new jobs, eight have median wages below the national median. This, of course, would worsen inequality, and would have strongly negative implications for overall productivity. (See charts.)



That is not all. Lord Turner also suggests other reasons for rising inequality and low average productivity growth. The first is the growth of “zero (or near zero)-sum” activities, some of which are not measured in economic output and few of which contribute to social wellbeing: think lobbyists, flash-traders or tax lawyers. Even education has a strongly zero-sum character: it is a positional good. Moreover, such zero-sum activities are well paid and so extract a great deal of rent. Successful creators of digital near monopolies also enjoy a great deal of rent. So, not least, do owners of property in prosperous conurbations. The new economy then is the rentier’s paradise.

The second is the under-recording of the value of free services. This is possible. But free services — social media, for example — may, he notes, contribute little to welfare. Right now, the contributions may be much personal misery and the destruction of our democracies.




This then is the picture for the medium-term future: sluggish overall productivity growth and worsening inequality. This is inconsistent with stable democracy. More likely is an aggravation of today’s politics of greed and grievance. The outcome could be plutocracy, populist autocracy, or a blend. If automation ultimately rendered humanity economically irrelevant, the challenges would be even more radical.

In the medium term, so long as there is a reasonable prospect of jobs for people who want to work, the crucial policy will be subsidising jobs. It is also vital to fund high-quality public services for all, notably, health, education and transportation. Moreover, as Dean Baker argues, the concentration of incomes from scarcity rents cries out for higher taxation of wealth and top incomes, notably including land and intellectual property. Indeed, intellectual property is almost certainly too highly protected now. There is a case for some protection, but not too much of it. I believe Adam Smith would agree.



In the longer term, our descendants may face even more existential decisions (provided the machines allow them to make them). How might they organise society in a world in which few people can do anything that is obviously economically productive? The world might become techno-feudal, with an owning elite hiring great numbers of cheap human servants not for their value, but for the pleasure of domination. People might instead share the abundance more equally, with all enjoying the civilised leisure that was once the province of the very few. Ours is the first civilisation to view work as the highest calling. Maybe that strange prejudice will need to be discarded.



That is for the distant future, however, though one we must think about now. But the trends under way demand action. If the natural tendency of our economies is towards ever-rising rent extraction and inequality, with all its dire social and political results, we need to respond in a thoughtful and determined way. That is the great challenge.

miércoles, julio 11, 2018

CHINA´S WEAK DICTATOR / GEOPOLITICAL FUTURES

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China's Weak Dictator

The need to rein in diplomats speaks volumes about Xi's power.

By George Friedman 



Most observers take Xi Jinping’s ascension from president to dictator as a sign of China’s national strength. But I see things differently – to the chagrin of even some members of my staff.

Dictatorships are not imposed on healthy systems – especially in China. Historically, as China rises, it loses stability. When it loses stability, it installs a dictator. The dictator may take the form of an emperor or party chairman, but he is a dictator nonetheless. It is in this context that I have begun to form a tentative theory: that Xi Jinping’s strength is a facade.

One of the hallmarks of the Xi administration is his anti-corruption campaign. In truth, it is a good old-fashioned political purge, meant to remove those adversely affected by Xi’s efforts to settle the financial system and those who remain committed to the policies of Deng Xiaoping. In other words, moderate liberals and internationalists. These factions see Chinese integration into the international economic system as a necessary component of modernization and prosperity.

And no component of the Chinese political system is more attached to this internationalist posture than China’s diplomats – the very same diplomats Xi personally warned on Tuesday about straying from Communist Party directives.

Beneath the facade, China’s reality is far grimmer. Much of the population still lives in poverty. A significant component of the Chinese economic elite stand to suffer from Xi’s reforms. And China’s professors, diplomats and local government officials, especially on the coast, are nervous about the direction in which Xi is steering the country. Combined, these three groups could threaten Communist Party rule. To stop the threat from materializing, Xi must prevent a coalition from forming against him. This means a constant shifting of economic policy and political purges that aim to rectify China’s structural economic problems without creating revolutionary discontent. We therefore expect the government in Beijing and the opposition, such as it is, to undertake constant and apparently incoherent actions, popular demonstrations, inconsistent economic moves and threats against Beijing’s grip on the country. 


Indeed, we’ve had two examples of this in the past week alone. Random demonstrations like the recent protests by veterans of the People’s Liberation Army must be contained locally before they can spread throughout the country. Hence, they are put down by police, violently if necessary. As for diplomats and local government officials, they must be subjected to institutional intimidation so that they don’t stray from the party line. Vigilantes in Chinese foreign policy cannot be tolerated.

Complicating the situation are trade tensions between China and the United States. Trade tariffs are a tremendous threat to China. In just 10 years, China's export-to-gross domestic product ratio has gone from about 32 percent of the economy to 20 percent. This is less a reflection of China’s very urgent strategy of de-emphasizing exports and more a function of lower demand abroad. The decline, brought on by the 2008 financial crisis, destabilized a vast part of the Chinese economy. Protectionist measures by the top destination for Chinese exports – the U.S. – threaten to further destabilize the system.

The proper diplomatic approach to this new challenge would be a policy of accommodation, one that assuaged the U.S. and allowed trade to continue unencumbered. But Xi cannot be seen as weak. He must retaliate, even if his ability to inflict damage on the United States is limited.

This is all part of the facade – to get Chinese citizens who will be hurt by Xi’s moves to feel a sense of embattlement and loyalty to Xi’s regime.

The instinct of the diplomats Xi lectured Tuesday is to bridge the gap with the United States.
From a purely economic standpoint, they are right. But politically they cannot grasp the dilemma the emperor faces. It’s for that reason that Xi made the loyalty of this faction of China’s bureaucracy a public issue. He needs to make sure that they will follow his lead. The very fact that he is insecure about whether they will speaks volumes.


To be clear: This is just a theory. Xi may well be calling all the shots, and this may have been a simple stunt designed as filler for a slow news day. But unlike in the West, where the media follows the daily melodrama like a dog, the media in China are directly controlled by Beijing, and Xi’s recent moves suggest he knows the danger he and his country are in – and that he is moving with all necessary haste to prevent opposition from rising. Remember, Xi is just one man. Make enough enemies and stifle enough opportunities and eventually even the most powerful dictator’s position becomes untenable.


Is China’s Innovation Strategy An Unfair Trade Policy?

Shang-Jin Wei

A worker presents a chip for fifth-generation (5G) mobile networks at China Electronics Technology Group

NEW YORK – In his statement announcing a second round of punitive tariffs on imports from China, US President Donald Trump singled out the Chinese government’s “Made in China 2025” plan as a threat to US economic growth and a clear example of “unfair” trade practices. Is there any merit to Trump’s claim? And, equally important, is the plan good for China and the world?

Made in China 2025 is a strategic directive issued by the Chinese government in 2015 to upgrade the country’s economic structure and growth model over the next decade. The plan comprises five key priorities.

The first priority is to promote and accelerate innovation, indicating that Chinese leaders understand that the previous growth model, with its reliance on cheap labor, has now run out of steam. The second priority is improving the quality of products and services. The third and fourth priorities are to boost “green” or environmentally sustainable production techniques and renewable energy, and to promote the structural transformation of industries and firms. And the final priority is investment in human capital and talent development.

The Chinese view these goals as both desirable and necessary. For starters, rapid growth and labor shortages (owing to an unfavorable demographic transition) have caused wages in China to rise substantially, far exceeding those of other developing countries such as Bangladesh, India, and Vietnam. For China to become a high-income country, it must switch to an economic model that emphasizes innovation, productivity growth, and environmentally-friendly production and consumption.

Second, Chinese firms increasingly face barriers to investing in the US technology sector and to purchasing high-tech components from US and European producers. This has led many in China to believe that unless it creates its own high-tech firms and supply chains, it will have no path to high-income status.

In both the US and China, policymakers have become increasingly mindful of what Graham Allison of Harvard University has called the “Thucydides trap,” which suggests that when a rising power like China meets a hegemon such as the US, military conflict is hard to avoid. Against that backdrop, many Chinese have come to interpret US accusations of “unfair trade practices” as an excuse for the US to do what it was going to do anyway: block or otherwise forestall China’s rise to global economic predominance.

To be sure, Made in China 2025 is essentially an industrial policy. But industrial policies are not necessarily “unfair” or incompatible with World Trade Organization rules. In fact, the very concept of state-guided development was practically invented by the US over 200 years ago, when Alexander Hamilton, the country’s first Treasury secretary, called for more government support of manufacturing, through tariffs and other policies. Since then, US governments have channeled massive subsidies through the treasury, defense, and energy departments, as well as the National Science Foundation and other institutions, to fund innovation. The German government’s Industry 4.0 Strategy is a direct inspiration for the Chinese plan.

The Chinese government’s 2015 directive stated that the first “basic principle” of Made in China 2025 is “for the market to lead and the government to guide.” It also stipulated that the market should play a decisive role in resource allocation, and that the government must “actively reform its role (from direct intervention) to strategic research and guidance, perfecting supportive policies, and creating a favorable business environment for firms.” There is no explicit mention of governmental discrimination based on firms’ nationality, nor is there any language about forcing foreign companies to transfer technology to Chinese firms. What matters is how the policy is implemented on the ground.

The plan calls for the development of a number of high-tech sectors that are deemed to be important for future growth, and established a range of numerical targets for 2015, 2020, and 2025. These benchmarks include research and development expenditures as a share of revenue, the number of patents registered, broadband coverage ratios, automation diffusion rates, reductions in energy intensity and CO2 emissions, and so forth.

The history of such economic directives in China suggests that the authorities often miss the mark on many of these targets. In fact, my own research shows that the Chinese government’s industrial subsidy policies are not particularly efficient. If the government were to intervene less and allow domestic private firms to compete on an equal footing with both state-owned enterprises (SOEs) and foreign-invested firms, innovation would actually accelerate. On the other hand, if the government insists on being very active, the pace of economic catch-up with the US will likely be slower.

In principle, well-designed industrial policies can correct certain market failures and help countries achieve higher efficiency and more equitable social outcomes, which is why the WTO does not prohibit them. But the WTO does prohibit differential treatments for domestic and foreign-owned firms. As long as Made in China 2025 supports certain sectors regardless of participating firms’ nationalities, it can be compatible with WTO rules. Whether that is efficient or not is a separate matter.

If China suspects that other countries are pursuing a containment strategy to impede its technological development, then its resolve to follow through with Made in China 2025 will strengthen. Moreover, the government will be more inclined to favor firms over which it has greater leverage, such as SOEs. The result will be less efficient outcomes and less innovation for both China and the world.


Shang-Jin Wei, a former chief economist of the Asian Development Bank, is Professor of Finance and Economics at Columbia University.

The U.S. Is Broke!

by: Shareholders Unite
- Debt scares once again resurface with US public debt at historically high levels and entitlement spending set to increase further. Some argue the US is basically broke.

- We will try to show that many of the arguments used are exaggerated and show you a country that should be much more broke, yet is thriving nevertheless.

- While not waving concerns about US public debt entirely, we think private sector debt is actually a much bigger risk, given the fact that it has caused most financial crisis.
 
 
SA contributor Ronald Surz wrote an alarming article on the state of the US economy, arguing that its debt levels (120% of GDP, or 390% of GDP including future Social Security and Medicare obligations) are so terrible that the US is "even more broke than we think."
 
The article is full of alarmist language, big scary numbers, and got a stamp of approval in the form of an editor award. But we're afraid that conclusion is simply wrong, and we will try to show you why.
 
Even worse
 
For starters, we introduce a country with the following characteristics:
  • It suffered an asset bubble crash that was three times bigger (relative to the size of its economy) than the crashes in the US in 1929 and 2008/9.
  • It has the world's worst demographics.
  • It has a public debt over 230% of GDP, more than twice that of the US.
 
If the US is broke, this country should be bankrupt already. However:
  • Despite the mother of all asset bubble implosions, the economy never experienced anything remotely like an economic depression and never got anywhere close to double-digit unemployment.
  • The economy (on a GDP per person basis) has done as well as that of the US (with the benefits much more equally spread), see figure below.
  • The economy has even lower employment than the US.
  • Visiting the country will give everyone the impression of a rich country with little poverty or crime, first-rate infrastructure.
  • The country has no inflation.
  • Interest rates, despite the massive public debt, are zero.
  • Its stock market has been booming.
 
 
The gap is even narrowing. If this country is broke than somebody forgot to tell it. The country we're talking about is of course Japan. It should give those who predict a terrible future for the US at least some pause for thought.
 
If this is what it means to live in a country that is broke, perhaps more countries will want to go broke.
 
Yes, we know, the BoJ, Japan's central bank is actually massively buying up Japanese debt, but despite all the predictions about this leading to massive "currency debasement", this keeps not happening.
 
In fact, the BoJ can't even achieve its stated target, which is a mere 2% inflation. And despite all the professed "currency debasement", the yen stubbornly functions as a safe haven investment, a place for investors to park their money when risks in the world economy increase.
 
Are we saying Japan shouldn't worry at all about its debt? No, we aren't. But Japan's situation is much worse compared to that of the US in all of the respects that seem to matter to the debt alarmist (much worse demographics, much higher debt, etc.) yet its economy remains rich, and the predicted crisis keeps not happening.
 
The fact that 'a Japan' exists should simply give the debt alarmist some pause for thought, that's all we are saying here.
 
Gross and net debt and assets
 
Surz cites a gross public debt ratio of 120% of GDP. But this figure significantly overstates the magnitude of the problem:
  • Net public debt is significantly lower as there are quite a number of US Federal agencies holding a significant portion of the US outstanding debt, like the Fed for instance, or the trust funds of Medicare and Medicaid.
  • As with any balance sheet, one should not only look at one side of the ledger but also at the asset side like all of the buildings, public lands, the commodity resources below the public lands (see below) etc.
On public assets, here is the IER:
The federal government owns a great deal of valuable assets both above and below ground. The above ground assets include buildings, lands, roads, railroad infrastructure, levees, dams, and hydroelectric generating facilities, to name just a few, many of which are underutilized. Below the ground, the federal government owns the rights to mineral and energy leases, from which they receive royalties, rents, and bonus payments... The federal government's total mineral estate holdings are therefore about 2.515 billion acres of lands. Thus, the federal government's mineral estate land holdings surpass the total surface land area of the nation of Canada... IER estimated the worth of the government's oil and gas technically recoverable resources to the economy to be $128 trillion, about 8 times our national debt.... IER estimated the government's coal resources in the lower 48 states to be worth $22.5 trillion for a total worth to the economy of fossil fuels on federal lands of $150.5 trillion, over 9 times our national debt.
 
Granted, the potential income (royalties, rents, taxes, etc.) on those below the ground assets is a mere fraction of what these assets are worth, but the financing cost of the public debt is also a mere fraction of the amount of outstanding public debt (and at historically low levels, see below).
 
We often hear that the public debt is such a burden on future generations, but it tends to be overlooked that future generations are also inheriting the assets or stuff that was done with the money which might have improved the economy (like investments in infrastructure, education, R&D, etc.).
 
Future generations also inherit most of the interest rate paid on the debt (see below).
 
Foreign holdings and currency
 
The debt figures sound scary because many think of debt in similar terms as those of a household, yet this analogy is quite misleading:
  • Much of the outstanding debt (58%) is simply debt to ourselves. Foreigners hold 44% of the debt, actually down from 56% in 2008.
  • Unlike households, economies have more tools at their disposal to deal with the debt, like increasing taxes, growing the economy or issuing currency to liquidate the debt.
  • The US debt is denominated in US dollars, the US can print these dollars at will so it can't really go bankrupt. Yes, under certain circumstances, this could accelerate inflation and/or reduce international confidence in the dollar, but these circumstances are much narrower than some would like you to believe. If you have doubts here, re-read the part about Japan above, where despite massive BoJ bond purchases, it can't even reach its 2% inflation target, and the yen is still a safe haven currency in international markets.
Take for instance growth:
If GDP growth is greater than interest costs plus new deficits, then the debt/GDP ratio will stabilize, all else being equal. Right now, the US government can borrow for 10 years at a 0.7% real interest rate; in comparison, real GDP growth was 2.8% in 1Q2018 (chart from JPM).
While the debt is large, servicing costs are actually historically low:
 
 
 
This also suggests that markets are not worried about the debt levels, which is at least somewhat curious because most of the debt hawks tend to be people who argue that markets are always right.
 
In fact, we're hard-pressed to come up with examples of a country that issued its debt in its own currency experiencing a severe funding crisis let alone bankruptcy outside of catastrophic circumstances of war or a collapse in production.
 
Almost all of the recent US financial crises have origins in excessive private sector debt and leverage, not public debt. We should be worrying much more about that, as it happens.
 
Medicare and Social Security
 
Another scare is the big number of future obligations of these programs, which usually run into a dozen or more trillions of dollars, a scary number indeed. But what the number relates is the present value of future obligations, simply relating these same figures as a percentage of GDP, and they will morph into a much less scarier variant.
 
Consider the figure below:
 
 
 
So, over the coming 22 years, Social Security spending is going to increase by... a whopping 1% of GDP and Medicare by almost 2%. Remember, this is over a period of more than two decades. Here is Bloomberg summarizing:
Put the current intermediate estimates for both Social Security and Medicare together, and you get a funding deficit that rises from 0.1 percent of gross domestic product in 2017 to 1.7 percent in 2035 and fluctuates between 1.6 percent and 1.8 percent for the rest of the century.
If you look at the figure again, you will also notice that Social Security spending has increased from under 1% of GDP to nearly 4% of GDP since the 1970s. Yet somehow, we managed to survive that much bigger increase even if one could imagine people in the 1970s warning about an imminent crisis of terrible proportions, citing big scary numbers of trillions in future liabilities.
 
In fact, below is actually a more scary graph depicting increases in healthcare cost of OECD countries:
 
 
 
But we've also managed to survive this epic increase in healthcare cost. What's more, you see how much of an outlier the US is in terms of healthcare spending. It spends nearly twice as much as basically every other rich country (and that without insuring everybody and not seldom producing worse health outcomes).
 
Not only did the US survive that, it also indicates that if the US should reform its healthcare system and build something like other rich countries have, it could save trillions of dollars in future liabilities (not to mention achieve universal coverage, something which all other rich countries, and a good many poorer ones have).
 
Given the percentages involved, this could make up for the whole projected increase of Social Security and Medicare increase and then some. Gone the scary crisis.
 
Citing these big trillion dollar numbers in future Social Security and Medicare liabilities turns out to be simply a prop, done by people who want to scare the electorate into making cuts now as opposed to.... having to make cuts in the future (or simply raise taxes a couple of points over a period of two decades).

When these are related to GDP, the problem becomes much more manageable. For instance, the US just passed a tax cut which is projected to worsen public finances by roughly $1.9T over a 10-year period, according to CBO.
 
We're not the only ones who noticed. Here is the above cited Bloomberg article again:
Following Treasury's example, I estimate that the tax bill passed in December will cut revenue by an average of 1.1 percent of GDP over the coming four years (between 0.8 percent and 0.9 percent if you factor in the growth effects projected by the Joint Committee on Taxation). That's less than the 1.7 percent of GDP that Social Security and Medicare are projected to add to the deficit in a couple of decades, but (1) it's not of a different order of magnitude and (2) it's happening now rather than two decades in the future.
So, a good deal of the projected shortfall of Social Security and Medicare over the same period could have been covered without the tax cuts.
 
Yet curiously, when faced with those numbers, the advocates usually argue that we have to... cut spending on Social Security and Medicare. That's fine, as long as it is made clear that this is a political choice (both the tax cuts and the proposed spending cuts on Social Security and Medicare).
 
Then, there are the scary warnings about having to dip into the trust funds of Social Security and Medicare, here is Ronald Surz:
We are spending down the corpus, and will have spent all of the Social Security Trust by 2034, while Medicare monies will only last until 2026. This might sound like we have time, but we don't, especially since nothing is being done to head off these catastrophes. It's full speed ahead into the reckoning.

Not quite. Both these trust funds and Social Security and Medicare itself are funded from payroll taxes. When these exceeded spending on Social Security and Medicare, the excess was put in the trust funds (which bought US Treasuries) and the interest income of these helped funding the entitlements.

This is no longer the case, and we're slowly liquidating the trust funds. That sounds scary (and it is often suggested as some disaster when they run out), and it is.
 
But it not nearly as scary as some suggest as even if these trust funds run out completely (which will happen at the projected dates cited by Surz), we still have payroll taxes financing most (three quarters) of these entitlements.
 
So, we do need to raise taxes or cut entitlements or a combination of both, but even if entitlements aren't cut, the tax increases no economic disaster, given the low level of US taxes in the first place.
 
Indeed, the US tax burden is lower compared to almost all other rich countries (and lower still after the recent tax cuts, not included in the figure):
 
 
 
In fact, Federal tax receipts (payroll taxes are Federal taxes) are much lower still and haven't trended upwards unlike other rich countries, from the Bloomberg article:
Yet federal revenue, which has averaged 17.3 percent of GDP since 1950 and also happens to have been 17.3 percent of GDP in fiscal 2017, is projected by the White House Office of Management and Budget to decline to an average of 16.5 percent of GDP over the next four years, and given the many loopholes and outright mistakes people have been finding in the hastily written tax legislation, I wouldn't be shocked if it went lower than that.
Yet, many of the countries with a much higher tax burden, like Denmark, The Netherlands, Germany, Sweden, Austria, and Luxembourg are doing quite well economically. The US is hardly bankrupt. It still has many choices to avoid escalating public debt.
 
History
 
Apart from the Japan example, one might also appreciate what happened with all the previous worries about public debt, which is done in this instructive article from Naked Capitalism.
 
Larger public sector
 
We think the panic about US public finances has much to do with an aversion against government.
 
We have no problem with that, as long as people understand that this is mostly a political, not an economic argument (even if it's often cloaked as an economic one).
 
But as we showed, the US tax burden is low compared to most other rich countries and lower still after the recent tax cuts. Funny enough, the fiscal implications of these tax cuts were routinely waved away by the proponents, who also tend to be the ones most alarmed by the fiscal implications of the entitlement increases.
 
What you also should realize is that public spending tends to increase as a percentage of GDP as countries get richer, for at least three reasons:
  • 'Baumol's disease' which shows that public sector productivity grows slower than the private sector, making it relatively more expensive over time (this originates from the fact that most public sector spending are services for which it's difficult or impossible to increase productivity).
  • Shifting preferences; when people get richer, they tend to place more importance on a safe environment, on healthy products, on a cleaner environment, better schools for their children, better healthcare, etc. all sectors which make disproportionate claims on the public sector (through regulation, justice, law enforcement or direct government involvement).
  • Economic complexity increases, which also tends to disproportionally increase claims on the public sector.
  • Populations age, increasing healthcare and pension cost.

Rather than panic, we should simply accept these realities and deal with them. How, that is a political choice, but there is no overriding economic logic determining that.
 
Conclusion
 
Does the US face bankruptcy? No, not at present. While the public debt as a percentage of GDP is historically high and its future trajectory isn't looking good, there is time to act, and there is much that can be done.
 
Moreover, much of it is debt to ourselves, so future generations also inherit much of the interest payments on the debt, as well as the assets on the US balance sheet.

The US is an economy, not a household, and as such, it has many more ways to deal with it, like increasing growth, raising taxes (which are low compared to international standards) or issuing currency, as the debt is denominated in US dollars.
 
The present value of future entitlement obligations is indeed a very large number, but the size of the US economy is also a very large number. When entitlements are expressed as spending as a percentage of GDP, we see that they rise, but only by a couple of percentage points of GDP and that over a period of decades.
 
The rise is serious, but not beyond the scope of the US economy to deal with. The real problem lies in the dysfunctional US healthcare system, which is almost twice as expensive compared to the average of other rich countries as a percentage of GDP. That's low hanging fruit just there.