Read about what happened back in the days when the US had no statutory minimum wages:
“…one young man didn’t want to stay on the farm so he approached a dry-goods dealer in town and asked for a job. After the guy decided to hire him, the young man asked what he would be paid. “Pay? Your pay? You should pay me for working here, you don’t know anything about the business. After you learn enough to be useful I’ll start paying you.” The young man worked three months for absolutely no pay.
How would you like to be that young man? For three months you are paid nothing, then you get a pittance after that. What did he think of his employer? Well, later he not only thanked the man for valuable lessons, but made him a partner in his own business. Maybe you’ve heard of that young man. His name was F.W. Woolworth and he became one of the world’s wealthiest men. What would have happened had that employer been forced to pay Woolworth more than his meager skills were worth?”