If you're going to add 20% to every bill, then put that on the menu where you list prices. That's a not a $10 item, that's a $12 item. Otherwise, the sanctimon

If you're going to add 20% to every bill, then put that on the menu where you list prices. That's a not a $10 item, that's a $12 item. Otherwise, the sanctimony is wrapped in condescension, communicating that not only do they think they're better than you for tipping (with your money) 20% rather than whatever lower percentage they thought you were going to top, they also think you're so stupid that you'll still think the prices printed on the menu are the actual prices.