Well, no, both parties in that scenario are cheating the worker. You can't really walk into a restaurant, pay the lower prices that are possible because of tipping culture, deliberately skip the expected tip, and then wash your hands of any complicity in the scheme. It's like people who are themselves comfortable but talk about how all social programs should be eliminated so the poor see the inherent injustice of capitalism and rise up to overthrow it -- it sounds like a bold stance but ultimately volunteers someone else to make the sacrifice.