You have to tip. It's not really a request. That said, a custom gifting a few dollars to those working brutal menial jobs isn't such a tragedy. What we need is a mechanism where servers can be tipped directly bypassing management. Could be just a QR code badge linked to stripe fast checkout.
I imagine a waiter living off Costco hotdogs and soda standing eight hours a day holding a jug of ice water and a game face with the heat of the kitchen to his back wondering if he can make both rent and the car payments. Watching groups of businessmen and beautiful women eat $300 meals leaving half of the food uneaten. It's emasculating, cruel. There needs to be something like the tipping custom. That kind if experience can build real resentment