John Waggoner at USA TODAY reminds us that war is the father of everything:
The last time the nation's debt was this big compared with gross domestic product — 70.4% of GDP — was immediately following World War II.
How did the Greatest Generation pare it down? It didn't.
It grew the economy faster than the debt, pushing down the debt-to-GDP ratio and making debt payments easier to manage. ...
The citizens of the U.S. owe $12.3 trillion in Treasury debt to banks, individuals and foreigners. That's about $40,000 per person living in the U.S., and it's not counting the amount our states owe — or, for that matter, what we owe to our individual creditors. ...
How did the government repay the war debt? It didn't, really. Much of it was rolled over when it matured, but new borrowing was limited. "During the early postwar years, the federal government ran either small surpluses or small deficits," says Anthony O'Brien, professor of economics at Lehigh University. The federal debt was $260.1 billion in 1945 and $274.4 billion 10 years later in 1955.
But the economy grew faster than the deficit did. GDP was $221.4 billion in 1945, and $394.6 billion in 1955 — despite high tax rates, which persisted. Because of economic growth, the ratio of debt to GDP fell nearly every year from 1947 to 1981. As the nation's debt became a smaller part of GDP, the debt became much less burdensome, much as a fixed mortgage payment becomes more affordable as your income grows.
