The government should support state universities directly, to help them limit tuition and provide loan and grant programs based on need and merit. Student debt can come from the university if that works, or from private lenders, just like any other consumer debt, but it should be underwritten like any other loan. If a parent wants to co-sign, as they do for leases and other obligations, that will likely open the lender pool up somewhat. If they can pledge collateral, that's better still, just like any other debt. I think this will all work to bring tuition down and introduce some sanity to the public higher education system.