This would save young Americans from going into crippling debt, but it would also make a university degree completely unaffordable for most. However, in the age of the Internet, that doesn't mean they couldn't get an education.
Consider the long term impact of this. There are a lot of different ways such a situation could go, for better and for worse.
I think if you read my comment again, you'd find I acknowledge things need to change, I just think your proposed solution is bad.
I can imagine ways to accomplish these goals more gradually, with less complete and utter destruction, but I don't think someone who proposed something so extreme from the word go really wants to discuss the moderate stance, so I'll leave it with you as a thought exercise.
I agree with you that we could do this gradually. I'm just creating a what-if scenario in this thread.