Sorry America but you are fools to yourself. You are the ones that want to tip everything that moves and thus setting the expectaion and then you don't want to. It seems as though it is a culture which has been ingrained into you.
Do it properly..... In Europe/Asia/RoW we tip if we think it was deserved and the amount is discretional.
Unforunately you have dug yourself a hole and are trying to squirm out of it. Please don't counter with the wage is so low that we have to. Have a minimum wage that is not so low that people can live on it.