People are coming up with new ways every day to claim disability. And some very legitimate claims now get brought up to the government because those with the problems no longer have a job.
My Disability Blog: Why Do Social Security Disability Claims Increase In A Bad Economy?
More and more military personnel are getting out/being put out of the military. Most of those are eligible for the 9/11 GI bill which pays more than many min. wage jobs just for housing (tuition is paid for separately, plus there is a book stipend and many qualify for Pell grant, which they get to keep). Such a good incentive for military vets to go to college after their service has never existed. Even the previous GI Bills only really paid for schooling, with very little left over, if any, for expenses.
Enrollment in college increased 38% from '99 to '09 where it only increased 9% from '89 to '99. College enrollment is still increasing right now. There is nothing "constant" about this.
Community Colleges Enrollment Drops, Pell Grants Increase - College Bound - Education Week