Simple Answer: So that the federal government could support its operations by levying taxes on its citizens.
Progressives
Progressive
The Sixteenth Amendment
Debt consildation
Sixteenth Amendment A+
progressives support.....wait forgot sorry
sixteenth amendment
economic amendment
taxes for the rich and famous
Income tax
sixteenth amendment
If you mean 'graft' as another word for bribery: no, progressives certainly don't support that.