1950 — the postwar high-water mark
The Rich Paid
After the New Deal and World War II, the U.S. ran a progressive tax system. A 91% top marginal income-tax bracket, a strong corporate tax, and active estate tax all fell hardest on concentrated fortunes.
Combining every tax (federal, state, local, income, payroll, corporate, property, and estate) the 400 richest Americans paid an average of about 70 cents of every dollar of income in taxes and still lived comfortably. The working class paid roughly a sixth of theirs.