Actually, if you check the history, you'll see that the period from 1946 to 1981 (which was a period when Keynesian Economics had great influence in the nation and the welfare state was growing more generous), was a period when debt as a share of GDP dropped almost every year. What changed in FY 1982 wasn't a rise of Keynesianism or expansion of welfare. What changed was Reaganomics. Once the government radically cut upper-class taxes, deficits soared.... and an orgy of peace-time spending on the military didn't help either. That's why the period from FY 1982 to the early 90s was one when debt as a share of GDP doubled. And, of course, when the same catastrophic experiment was repeated by Bush, the results were the same: we went from debt falling as a share of GDP, to it doubling again. Of course, that won't keep the dummies from cheering as Trump tries the same thing yet again and then acts surprised when he gets the same results.