My reason is that you don’t see unions at McDonald’s or front facing corporations. Which tells me that if a McDonald’s employee gets screwed by working and not getting paid for it (or something similar to that effect) then he would hire a lawyer and sue then for a gang of money.
I can't stop laughing. Seriously. Do you have the tiniest remote experience with the American legal system? You think a worker can just sue his employer for a "gang of money"?
You are far too naive to understand why labor unions are so important and the reason collective bargaining is so crucial to maintaining a good workplace environment.