LOL. I wish the government gave 0-interest loans. As it stands in the US, Stafford Loans are higher than most car loans [3.73% undergrad, 5.28% graduate, 6.28% PLUS]. Costs are skyrocketing despite government loans. It's not the working/middle class students asking for new buildings, new "centers of research", new dorms, etc. Colleges are building these things, giving you the bill, and your options are go:not go.
As the percentage goes lower the amount of debt will increase. The same thing happened in mortgages. The monthly payment stayed relative constant (plus inflation).