Fine but a few things. 1) the service at restaurants and bars in Europe is terrible. 2) the employees at US restaurants and bars often make more money than people doing the same job in Europe. 3) it allows the folks with more money pay a larger share and those with less to pay a bit less.
The problem with tipping is tipping in places which aren't restaurants and bars.
The problem with tipping is tipping in places which aren't restaurants and bars.