I tip (live in US) as we are shamed into it, but I find the relationship between the customer and staff subservient and dehumanizing. The service folks must do the dance and check on you every 5 minutes ("Are we doing good here, hon?) while I in turn must come up with a fake smile and a thumbs up. What else am I gonna do? It's all kinds of weird but unlikely to change.

A couple of decades ago I had a waiter run out to the street after me, midtown Manhattan, a sushi/tappas place, sternly inquiring as to why I didn't tip them. I simply forgot, it was very late. I didn't need that.