Many people are not willing to take debt, because it is associated with a social stigma to be in debt. So it does scare away students, even when you have a special system, that would prevent unemployed from having to pay back. It is not rational. But you have to run your country and your economy with the people that are there, not with fantasy people, who behave perfectly rational.

Der Amerikaner ist die Orchidee unter den Menschen
Volker Pispers