This is the bill of goods sold by the for-profit colleges themselves (all colleges are for-profit even if non-profit, the people profiting are the administration and staff, which balloons to consume all revenue).

We could reduce student usury by demanding that all loans be paid back at a maximum percentage of income for a set number of years. If the degree isn't worth 5% of expected job salary for 15 years, too bad. Obviously the numbers can be adjusted but the whole sale pitch is "spend $X, get a leg up on the pile and make twice $x yearly". Just codify that, and suddenly the loan companies are on the hook for $500k loans for basketweaving degrees that produce baristas.