> But at the same time shutting out the poor from college unless they're also straight-A students and somehow

So, stop federally guaranteeing (and issuing) student loans (which mostly don't go to the poor) and increase need-based, and public-service-based, grants. Widely available no-need loans drive up prices but also insulate people from the immediate effects at a time when they are cognitively least able to appropriately assess long-term costs.