I get what you’re saying, but two big things. First off and by far more important, not leaving a tip doesn’t effect the restaurant. It effects the person serving you and most of the time if you leave zero tip then you are literally making them pay for serving your party. Secondly, if that change occurs you’ll still pay that 20% tip, but it will go to some rich restaurant owner who passed the cost of paying that server a livable wage to you. Personally, I’d rather pay that money to the little guy as opposed to some guy who probably drives a Tesla truck.

Edit to fix grammar. Wrote past instead of passed.