Ah, one remembers when Reagan tried (and ultimately succeeded, but it was a tough go) to index income tax rates to inflation.
Because of the horrendous rate of inflation during the administration preceding his, poor people were still being taxed at the rates aflluent people had been taxed in 1961.
Six thousand dollars a year was good money in 1961; not so in 1981.
It was a real rough-and-tumble fight, to get tax rates adjusted for inflation.
The main culprits--the obstructionists--were dead ted in the U.S. Senate and Tipsy O'Neill in the U.S. House; so much for their "concern" for the poor.