I'll play in the money I save by not tipping 20%.
I worked fast food in high school. I prepared food, cleaned the kitchen, washed dishes, took inventory of product, swept and mopped floors, and even cleaned the restrooms. The only thing I didn't do, was take a customer their food and drinks to their table. We even washed the windows, inside and out, and washed down the walkways and drive thrus. On weekends, they had one of the old ladies do that. And even then, they didn't get tips. So explain to me why waiters should again. Because they refill the salt and pepper shakers during the slow period?
Answer, boy.