It's actually exactly like that. In the feral world of New York City wait staff, where people only live on tips and there is no base income, the income gap is extraordinary in the same shift in the same restaurant. And it's only slightly based on looks, or how "cute" someone is. It's almost entirely based on their skill and ability to serve the customer well. I could walk out with $250 a night and another waiter would walk with $350. He was simply faster, more clever and better at serving and charming the customers. I was a bad waiter. Of course, the prettiest women among us might walk out with $450, so I guess if someone really wants to complain about life being unfair, they could. But those girls needed to stockpile cash then while they were young. As an old man, a waiter can still make the same.