Under the law, federal student loans are already forgiven after 25 years. He's just knocking that period down by five years. Is such a measure liable to mean some students may not repaid their loans in full? I'm sure it will and that does concern me somewhat, but since his immediate repayment proposal is based strictly on how much the "student" earns and would increase his repayment consumate with his future earning (i.e., the student working part-time now as a cashier, waiter/waitress/hostess, landscaper, etc.) won't be doing that same job 3, 4, 5, 20 years from now assuming they're able to work in their degreed career field. I can speak on this because I have three young adult children between the ages of 19-23 who all work and one is attending out-of-state college on a full scholarship in aviation mechanics. The problem all three are facing right now is being able to afford to live on their own without my financial support.
My son whose in college until recently had a difficult time finding work even part-time. My oldest son finally found a job that pays above minimum wage. I'm helping him to better manage his money and encouraging him to invest now while he's young. My daughter is just now beginning to get on her feet after experiencing a few setbacks (poor dear; Murphy's Law just won't leave this poor child alone). So, I understand the struggles these college-bound Occupiers are lamenting. I see it every day in the lives of my children.
I really wish people would stop seeing things in such short-sighted, narrow views. Try to put yourself in someone else's shoes for a change.