Everyone wants a tip now. Touchscreens and the pandemic have created tipflation

IMO it has to be a gradual, memetic process.

1) Start, obviously, with legislation outlawing the use of tips to make up for below minimum wage pay (2.13/hr plus tips but guaranteed minimum wage if you don't make enough tips at the end of the pay period).

2) Follow up with legislation and/or campaigns to address the current incentive to not report cash tips - that is, simply put, do not tax the recipient of tips below some reasonable threshold. This is actually already built in for most income brackets, so you need the third step:

3) Simple, free, and widespread education of how taxes ACTUALLY work when you're below the level of most HN readers.

Once those are in place as a basis, you tackle the culture:

4) Use the same targeted propaganda methods currently used at the demographic of service workers (if you ain't sure, ask them yourself what they are into and work backwards to where they got that idea) to make accepting tips a negative. Make them feel like getting tips is anti-[thing they like at the time]. Make tipping associated with incels or climate change or something, idk.

5) Since cash is getting phased out anyway, tax tips more than the service that's being tipped.

Yeah, I am in the habit of tipping bartenders but never got in the habit of tipping baristas. I can't say I have a rational reason for that, it's just I've followed what I see other people do.