Don't know about the US, but it would be illegal in many countries if workers don't reach the minimum wage despite working full-time. Of course they could fire

Don't know about the US, but it would be illegal in many countries if workers don't reach the minimum wage despite working full-time. Of course they could fire slow workers (at least in the US, in Europe it's often not that easy), but then they are back at the problem of the submission: running out of workers