Actually, you're incorrect.

It is expected by the US government that tips are the majority of one's wages. That is why tipped employees are generally not paid the legally required minimum wage. It is expected that the customer's tips will make up the difference.

Waiters make 2.63 per hour in most states in the US, which is less than a third of the mimimum wage. Could you live on $105 per week? No, which is why the minimum wage is so much higher.

In fact, few waiters even see a paycheck, because our wages don't even cover our taxes and insurance. I have to pay several thousand dollars per year in taxes beyond my paycheck. (I actually just figured out my taxes for this year yeasterday!)