IBR is just another way for colleges to more reliably price discriminate. If the average student gets a $500,000 NPV wage boost from going to college, the college can charge $499,000 and capture most of it.

With IBR they can do even better. Instead of charging everyone the average, they can charge each and every person his/her exact wage premium.

And it's all backed up by the IRS enforcing collection, too.

I can see why schools would freaking love this. Why would any one else?