>The private sector will replace them for students who are good bets, probably with income-share agreements or something similar and MUCH less predatory than the current federal loan programs.
[Citation needed]
We already know who the "good bets" are. They're the rich kids. And if you think "income sharing" and the private sector will drive rates down from a federally-subsidized ("predatory") rate, well, I don't know what to say.
I certainly don't think burying underprivileged students under a mountain of debt at graduation is a good thing. I'd very much like to see costs come way down, and I do agree that doing something about the loan system is a piece of the puzzle. But the reason the underprivileged are taking on this debt is that they're attempting to move up, in a way that avoiding debt by avoiding higher education will never achieve. Unfortunately, higher education has become the only way to hang on to an otherwise-falling standard of living; wage stagnation despite increasing education level.