To enforce a minimum wage, you have to guarantee that people actually get paid at all. So in general, unless you're running a non-profit, you will have a really

To enforce a minimum wage, you have to guarantee that people actually get paid at all. So in general, unless you're running a non-profit, you will have a really hard time legally with unpaid volunteers. If you don't mandate wages for employees, you have companies exploiting weaker people for their work, often under misleading pretenses.