Awesome idea

Some college really should try this:

Harvard would simply collect (for the sake of argument) 1% of the student's income for the thirty years after graduation. Those going to hedge funds and law firms will pay more while those pursuing teaching or public interest work will pay less over time. ... it would place the burden of paying for higher education on the person who benefits most directly from the education: the student, rather than the parents.

Another benefit is that schools would spend less money on fields that are neither charitable (education, public service) nor profitable (banking).