And what happens when the bubble bursts and the house is now worth 200k less than what it was originally purchased for? The bank writes it off.
So I propose we give everyone a paperclip with their degree and then if they file for bankruptcy they can give the paperclip, which depreciated 50-100k, back to the bank. It works for boomers so I think it'll work for millennials.
...I'm only half kidding with this comment.