I think that by 17 the damage has been done. This program might have had some benefit if it were directed at 7-9 graders, and paying them less. Maybe not even giving them cash, but vouchers for school things or other necessities.
Or perhaps, getting them the hell out of these failing schools and sending them to privates where they can actually learn. You know, kinda like W's voucher program, that the left fought tooth and nail and exclaimed it would never work,
(so where's the ATV Asshat to defend THIS?), so you do not put the cash into a little criminal's pocket so that he/she is going to spend it on everything EXCEPT education!