Their degree and future earning potential is supposed to be the collateral.
Unfortunately, the earning potential of a generic bachelor's degree seems to have mysteriously fallen at roughly the same time a flood of students were offered huge loans to achieve them. Maybe some day we'll be able to find the connection.
I don’t think that’s correct. You can’t put up “future earning potential” as collateral while simultaneously allowing for discharge of debt in bankruptcy. That results in an incentive to incur as much debt as possible and then declare bankruptcy shortly after graduation when the impact is negligible. That’s the whole reason why student loans aren’t generally dischargable in bankruptcy.
I agree that's the theory, I disagree that it actually is what would happen in practice. E.g., if the government stops guaranteeing the loans I seriously doubt banks will accept "future earning potential" as collateral. So I disagree that it's actually collateral (your initial claim). The real collateral is the govt promise to back up the loan.
So the question still stands: if the government no longer guarantees the loans, what is the proposed solution to prevent banks from no longer lending to students?
Unfortunately, the earning potential of a generic bachelor's degree seems to have mysteriously fallen at roughly the same time a flood of students were offered huge loans to achieve them. Maybe some day we'll be able to find the connection.