The disadvantaged class is poor people. Poor kids will have to work and will make less money while doing it than they should. So not only do these kids have to

The disadvantaged class is poor people. Poor kids will have to work and will make less money while doing it than they should. So not only do these kids have to waste valuable time at low-wage jobs (rather than studying, being kids), but they get even less money while doing it. Wealthy people's kids won't work.