The problem is it is so ingrained in US culture that switching to tip-free has generally failed where tried, even in pro-labor lefty hoods in blue cities.
Numerous restaurants in NYC tried and flipped back over the last 10 years. Restauranteurs reported illogical / innumerate behavior where sales went down when they switched to untipped higher prices.
https://www.eater.com/21398973/restaurant-no-tipping-movemen...
The only restaurants that it stuck were Japanese restaurants that cater primarily to Japanese ex-pats, because culturally its familiar to them.
I remember when Uber first came to Austin, one of the big draws was that a tip wasn't expected. The app didn't even allow it IIRC and Uber sort of advertised this as a feature. 15 years later, back to it, tips seem expected again?
Oddly enough, the fact that I was initially sold a product where a tip wasn't expected has made me continue to not tip Uber drivers. Not sure what that says about me.
Well sure, it has to be mandated through law or underpaying workers will inevitably outcompete those that pay workers. I don't think that's an argument that anyone likes tipping culture (except wait staff in bougie cities).