"Frankly I don't do it at a buffet... I'll have them remove it if they put it on... it makes my wife crazy, but I just can't see any justification for tipping someone that DIDN'T serve me my food... and at a character meal... a 18% tip on a 150 dollar meal is 27 dollars... does waiter that spend less than 5 minutes getting a drink deserve 27 dollars? The equivalent of 324 dollars an hour? If that's the way it is, then I shouldn't have gone to med scholl I should have just gone to be a waiter at Disney after high school and I would be a millionaire by the age of 21."
I realize you're exaggerating for effect, but I must say I know several doctors and several waitresses. My brother-in-law who is a brain surgeon has more money than he could spend in ten lifetimes.
The doctors I know have huge homes, many cars and no money worries. The waitresses I know rent small apartments, may have one car and have many money worries.
A doctor insisting that the tip be removed is a bit much, I must say. I'm with your wife on that one.