Well, it seems the actuarial math should include projections for people paying off their loans early just like they include projections for defaults, etc, and i

Well, it seems the actuarial math should include projections for people paying off their loans early just like they include projections for defaults, etc, and if you demand an above-market interest rate, obviously you'll increase the likelihood that people find better deals elsewhere. But what I'm really objecting to is the conclusion that the future loss of interest represents a loss of income, when they now have the principal back and can invest that in the currently best way possible. If what you get from those funds today is significantly worse than the projected income from those loans were, then it seems you are implying that student loans really are meant to shaft the people who take them out.