1) What if you make $40k even? Is the 15% adjusted based on your salary?
2) What happens if you lose your job 1 year in? You've paid back half your debt... what about the other half? I would feel bad telling people about this to see them do it, and then get jobs (either with Modern Labor or somewhere else), and then a year in they get cut, have no job, and are thousands in debt.
3) What if someone is in the program, and halfway has to drop out for xyz reason? Do they owe the money back?
I really like the idea, just wish there were some more details so I could feel confident telling friends about it.