From a non-US/middle European perspective[0]: the US-tipping system is weird[1] to say the least and easily exploitable.
Combine those two and yeah, "service" gets ugly on both sides.
I can understand why so many are upset in their experience about their respective situations (especially in the US) and trying to think about solutions to counter the "exploitation"/"inefficiency" in this new context. But it is also easy to get caught up by the dynamics at the ground exerted by the pressure from above (macroeconomics).
Historically, the issue of "tipping" seems to erupt in times of hard economical/societal challenges. Like US-Prohibition 1919 or my favorite example during German industrialization in the late 19th century:
>More generally, tipping, is a morally fraught issue in the history of hospitality and public education in Germany (more accurately, nationalen Pädagogik, or national pedagogy), going back to the nineteenth century. The jurist Ihering (more commonly referred to as Rudolf von Jhering, with a "J") argued that tipping encourages vices like begging, greed, false or feigned friendship, vanity, and hedonism among service personnel. He wanted service people to be penalized for receiving tips, and employers to pay enough that tipping would not be necessary. The controversy about tipping continues.[2]
Interestingly through this moral/social debate in late 19th century Germany, "tipping"/"Trinkgeld" didn't vanish (intention of Jhering) but people became more aware of the social situation and a balance has arisen out of it.
[0]https://switzerlandtimes.ch/lifestyle/the-impact-of-credit-c...
[1]https://en.m.wikipedia.org/wiki/Gratuity
[2]Touwal, Amital: Anthropological Study of Hospitality (2016): The Innkeeper and the Guest, p.70