Do you work for free? What if someone came to the place where you work and demanded that you work for them for free? Because that’s exactly what you’re doing to servers in America if you aren’t tipping them, and I can assure you that no one on the planet wants to work without pay. It is not a personal opinion, it’s an objective fact.
Also, I’d like to point out the hilarious irony of you making a blanket statement about all Americans by claiming that’s what Americans do. The projection is palpable.