Americans making over $250,000 in 1944 — over $3.2 million today — paid 69 percent of their total incomes in federal income tax, after exploiting every tax loophole they could find. In 2007, by contrast, America’s 400 highest earners paid just 18.1 percent of their total incomes, after loopholes, in federal tax.
I guess 69% and 18% are about equal.