Wage overall are higher in the us, you can’t directly compare because you don’t have social srcurity, work security and number or other benefits.
I never went to the us, but in canada where people tip there’s very few small restorants and they’re expensive in general. Compared to france, there’s no tipping and a shit ton of small restaurant where the food is easily 3x less than in canada.
Also I think they were refering to the origins of tipping culture in the us, which was a way to continue slavery by not paying a wage to the black workers.