I love that she called stiffing the waitress on the tip "a lapse in my character and judgement", too. Gonna call foul on that one. No only does it fit in with her character and judgement, but what do you want to bet this pastor has done this dozens of times before? You don't just wake up one morning and decide to have this philosophy. This is something you've seen before and thought about and have made a part of the way you act. Nobody gets a bigger tip than God. Not Taxi drivers. Not the pizza delivery guy. Not a bartender. No one. 10% is the max, with options only heading down.
Would anyone have believed Mr. Pink if at the end of that scene in Reservoir Dogs he was like, "Sorry. It just seemed wrong right now. Normally I tip like a regular ****ing human being but today for some reason I'm having a lapse in my character and judgement."