I’m not into tipping when I’ve visited the US, since I come from a country where servers are paid the equivalent of Fr. 20-30 ($24-43) an hour so there isn’t an obligation to tip them, but that’s the opposite in the US. Am I allowed to hand them large cash tips such as Fr. 1000 ($1236) or 500€ ($583)? It gets weirder: as apparently fast food places demand a tip, like really? It’s getting out of hand, what’s the point then?
If everyone stopped tipping today workers would quit, and restaurants would have to change their pay system to get them back or fail.
But that is not for foreigners to do or decide.