https://www.nytimes.com/2018/12/21/nyregion/the-misadventure...
And just as a counter point to your last sentence - waiters in UK frequently make hardly above minimum wage(£8-10/hour) and tipping is neither required nor expected.
You really have no idea how tenuous employment for people is in those situations, do you? They don't take these jobs because they pay well, they take these jobs because that's all they have.
What they're going to think is "what a fucking asshole". Zero tipping is reserved for the sorts of dickheads that leave "Jesus money" instead of actual cash.
Minimum wage in the UK sounds a lot higher than minimum wage for wait staff in the US which can be as low as $2.13 in some states.
£10 is $13.29, which is a hell of a lot closer to $15 than $2.13.
Really? Because I keep hearing how waiters in the US are actually paid very decent thanks to tips. They are ignoring the fact that the employer pays very little because they can at least make a living from tips. That's not acceptable.
If you're stuck in a rural location with light traffic and moderate incomes you're screwed.
The US is proving time and time again that the government will side with companies(capitalism, yay) so you can't expect the system to change unless the companies lose money.