I think most people's view would change if they were in a situation where tipping makes the difference between being able to pay your heating bill.
Tipping, as it exists in the US, is pretty much a dark pattern.
I think most people hate tipping because they hate when people ask for tips. But a formal tipping system might reduce the number of Uber drivers who already ask for tips.
I tip 22% for full service, 10% for partial. If I go to the bar, I tip 10%, or a dollar/drink if I'm paying cash. If I'm ordering takeaway somewhere, I tip around 5%. I have no idea which of these are reasonable or not, because there is no "tipping class". I have no idea if places I regularly go like to spit in my food because I tip like shit.
Can you explain the math? Why is this amount higher than 20% rather than lower than 20%?
According to who? Certainly many restaurant workers in the U.S. earn most of their income from tipping.
The only way this works over the long term is to force out competition so that they can massively jack up prices, and/or replace drivers with self-driving cars that have lower costs.
If Uber does this and they realize customers are not riding as much anymore, then it is a problem with their pricing and setting of expectation.
Is their any data to back this up? Outside of Hacker News, I don't think I've ever heard someone complain about tipping. I have no problem with it.