College, it turns out, is not the great equalizer.

Politico reports.

The trouble with free college for all

Sen. Bernie Sanders (I-Vt.) spent much of his presidential campaign calling for a political revolution that would take money out of politics and reduce income inequality. His policy proposals, such as single payer health insurance and higher taxes on the rich, were directly aimed at accomplishing those goals.

But new evidence shows that one of Sanders’ favorite ideas—free college—would not reduce income inequality. In fact, it might make it worse.

The research, which is set to be published later this year, was highlighted in an UpJohn Institute research brief a few weeks ago, around the time that Hillary Clinton partially endorsed Sanders’ college plan. The authors find that college graduates earn more than those without a college degree—a finding on which experts nearly universally agree.