Why not just make the education less insanely expensive? STEM fields pay more but we need other jobs filled that are not STEM which is something we forget very

Why not just make the education less insanely expensive? STEM fields pay more but we need other jobs filled that are not STEM which is something we forget very regularly. We cannot just expect to have a permanent underclass of essential workers that we then turn around and deride for making shitty choices at every opportunity and basically hold in perpetual servitude.