It doesn't even have to be free. Just create a subsidy and regulate the colleges that agree to be subsidized. Make it fully voluntary but also give the partici

It doesn't even have to be free. Just create a subsidy and regulate the colleges that agree to be subsidized. Make it fully voluntary but also give the participant colleges a special badge to let people know that the college is federally funded and therefore has to provide various information to the students or possible put a maximum loan cap on the student, and if the student is making progress and reaches that cap then the remainder of their education is free of charge to the Bachelors level.