You assume that everyone thinks as rationally as you do about financial decisions when it comes to paying for college.
What do yo mean by "rationally"?
And if they do not "think rationally", this is, basically, an invitation to lock the young people out of college: stop subsidizing all thos cheap loans, and they will go work in McDonalds, as they should.
I know a lot of smart kids that are choosing to go to more expensive private colleges out of state rather than take great deals at decent in state public universities because the private college is ranked higher by US News. I am not taking that route, but it would be easy for me to get into most private colleges, and if my parents cosigned on loans, I could get all the money I would even need to attend school. Of course, I would have considerable difficulty paying it back, but for some, the temptation to go to a more expensive private school is just too much.