At least in Japan, that hasn't happened. The homeless and semi-homeless are an entirely separate group of mostly 50+ (former) construction workers and day laborers. The hikikomori-likes who cannot live with their parents stay in manga cafes that offer cheap overnight rates for a comfy chair and a PC in a booth. They need some kind of job to pay for it, but not much.
There won't be jobs for america's drop outs. There aren't jobs for america's graduates, right now.
I'm guessing this will be very slightly motivating for the few that can get their shit together and get haircuts and real jobs. But for most, it's going to be even more disastrous than a lifetime in one's parent's basement.
