Huge difference between the debt of WWII and today’s debt.
In WWII, the bulk of government spending was discretionary and easily reduced. Mainly, through cutting the military budget.
Today, the bulk of spending is in the form of mandatory entitlements. And they are getting worse with every passing year. Another huge budget item is interest on the debt itself, and this is also mandatory spending.
There is no possible way you can conclude that eliminating the current deficit will be remotely as easy as it was to reduce the WWII deficit.
The U.S. debt problem was solved by massive economic growth, but that growth was the result of a major shift in economics as the wealth of the rest of the world rapidly grew and the U.S. stood as the sole free superpower with an untouched industrial infrastructure, which caused a huge expansion in foreign trade, to America’s benefit.
Another one-time boost came as a social shift moved women into the workforce, nearly doubling the productive manpower of the U.S. economy. This and the baby boom led to a period of unprecedented productivity growth during a period of low social spending. That’s how the U.S. escaped the WWII debt.
Nothing remotely like that exists today. All the trend lines that were up in 1946 are down today. Social spending is increasing. The population is aging instead of getting younger. The number of workers available to provide for the elderly and the non-working poor is declining. The U.S. is losing competitive advantage against the world rather than gaining it. Government spending is increasing rapidly. Instead of the rest of the world increasingly being a source of new markets and new wealth, major markets are declining as the populations of the major economies age even faster than they are aging in the U.S.
This is not 1945. This deficit and debt are the biggest threats the U.S. faces, and it needs to be taken extremely seriously. You need major entitlement reform, a major scaling back of government services, and probably some additional tax increases, so long as they go to debt service.
Another way in which this is not 1945: The rich and their wealth have much greater international mobility. Your ability to tax them with impugnity is much lower now than it was in 1945, where America was really the only game in town. Set tax rates of 70% on the rich, and watch as your most productive, wealthiest citizens pack up and move to Canada, Australia, and Europe.
The high levels of U.S. debt (both government and personal) have been sustained in large part by the rapid increase in wealth in Asia. At some point, when growth in Asia slows down and Asian countries move from policies of savings to policies of local investment and maybe even run their own deficits, the pool of available capital will collapse. Eventually a U.S. treasury auction will fail. Then look out.