Many servers have opposed efforts to replace tips with a “living wage” (because servers and bartenders can make $20-30/hour with tips). Back of house staff tend to lose out from that system, so they tend to favor eliminating tips.

And you think this hold true for the average worker, rather than the pretty obvious exceptions that make $20-30/hour?

Every friend I have who is a waiter or bartender make over 15 per hour and many around 30.

When I asked if they'd prefer wages even if they made the same per hour, every single one said they prefer tips.

I don't know if it's true, but I recall reading somewhere that working class people tend to tip Uber drivers more, because "they know what it's like" to have that kind of job.

If so, that's a really twisted form of price discrimination.