why are we expected to tip?

Don't get me wrong if anything I'm an over tipper. But what a lot of states (not all) if the wait person doesn't make enough from tips and hourly pay to meet minimum wage then the employer has to make up the difference. And how honest do you think they are about how much they make in tips if that's the case? When I was 14 I was a busboy in a fancy restaurant and the wait staff was supposed to give us 10% of their tips (divided that 10% among 2-3 busboys). They wouldn't give us nearly 10% of the hundreds they made per night. Because we made minimum wage which was all of 5.15 at the time. Not only that but the head busboy who was in his 20s would rip me and the other kid (14-15) off on the back end. We were lucky to make $30 a shift which is shit at a place where the food averages $100 a person.