Every time there is an initiative to require paying living wages, food and bar service representatives fight to get it killed because they make _more_ money from tips than they would from regular wages. Tip-earning workers in America are well represented.
This is a dummiest reason tippers come up with. "require paying living wages."
Except the actual workers don't: very very few consistently earn a higher wage, instead on a "good night" they count the win and ignore the losses when it's not.
Even with reliable good nights the off nights eat away at that margin.
It's a false economy.
Could ban tipping by law. Businesses where employees are caught accepting tips get fined. The price on the menu or shelf must be the final price at payment (including sales taxes and other fees).
Could always do what we did in Canada: pay living wages but still inexplicably keep tipping culture