The Great Recession has provided a taste of the U.S. Treasury borrowed $1.4 trillion, nearly 10 percent of GDP, and it is expected to borrow even more this year. Those giant defi- cits are financing a massive effort to avoid a repeat of the Depression of the 1930s some- thing most economists believe to be a good investment. But the borrowing will hardly end when the economy recovers. President Obama's 2010 budget projects almost $9 tril- lion in additional deficits in 2011-20. By 2020, trillion-dollar deficits will become the norm even in years of solid economic growth and low unemployment, rather than an unpleas- ant aberration linked to a deep recession. tirement of the baby boom generation and the growth of health costs at a rate far faster than the growth of GDP mean that govern- ment spending on Social Security, Medicare and Medicaid (which pays for most nursing- home care for the elderly) is likely to explode. By the nonpartisan Congressional Budget Of- fice's reckoning, spending on those three pro- grams alone is expected to reach 18 percent of GDP in the year 2040. That is the average level of revenues, measured as a portion of GDP, that the federal government has col- lected over the past 50 years. So, in this sce- nario, there would be nothing left to pay for everything from defense to interest on the debt. ing deficits are a certainty. President Obama's State of the Union address was a veritable panegyric to the virtues of tax cuts (although he is willing to raise taxes a bit for the rich in general, and rich bankers in particular). And now that Republicans have become defenders of spending every last dol- lar that Medicare recipients are currently promised, the prospect of reining in entitle- ment programs seems more remote than ever. unrestrained entitlement growth, the federal debt is projected to reach 100 percent of GDP by 2023. By 2038, it would reach 200 percent of GDP. optimistic assumptions. They presuppose that interest rates on government securities will remain historically low, and that the economy will grow at a historically healthy clip. Indeed, in these projections, the average real interest rate (the nominal rate less the rate of inflation) actually falls from 4 percent to 3 percent from 2013 to 2024 and remains there throughout the period this in spite of the projection that the annual deficits will in- crease steadily from 2013 onward. tion) and Peter Orszag (the current White House budget director) estimated back in increase in the deficit as a portion of GDP. By that calculation, one would expect rates to in- crease by at least four percentage points be- tween 2013 and 2083. So interest payments on the debt and thus the average annual |