The "risk premium" on these loans likely would've been FAR higher (or rather, people might've just stopped making loans altogether) if people were just allowed to declare bankruptcy right after getting the education.
Why would the most secure debt have such a high interest rate? (Treasuries at the time were 2-3%)
> is already jacked
If you're arguing why it's not the same rate as treasuries, I'm not sure what more I can say. There's more that goes onto pricing loans than just the risk premium. It's a part of it, but not the whole story ("why are government-backed MBSes not the same interest rate as treasuries?").
Furthermore, just look around: you sure there's no "risk" with these loans? You cannot in honesty argue otherwise.
When I took out student loans in 2013, I got a 6.5% rate for 25 years. It can’t be discharged and any default is guaranteed by US Department of Ed (eg, I die, or use income based repayment for 25 years and discharge the balance). So to the borrower, the “risk” is that the USG defaults.
For comparison, I bought a house that year and got a 4.25% 30-year mortgage that has my house as collateral.
Why would a student loan that can’t be discharged have a higher rate than a mortgage?