Wasn’t there some level of government paying off those loans? That would be 11 years minimum between the first loan and bankruptcy, so it’s a pretty good bet they ain’t paying ever. That could be reasonable, but of course then you have the government paying off the guarantee of the biggest deadbeats.
IMO, making student loans completely non-dischargeeable (except in case of undue hardship, which is almost never the case) has only enticed a lot of "schools" to push loans to students, resulting in much higher participation rates, and much higher tuition.