IUseBrains-
Just because people are paid more doesn’t mean they do a better job. Look at union employees for starters.
My wife and I went out to eat once. After taking our order we never saw the waitress again. One of us had to go to the kitchen to get the food, keep refilling our glasses with water, clean up, get a waiter to ask for the dessert menu and get our bill. “At least we don’t have to leave a tip”, my wife joked. But they were one step ahead of us, the 18% gratuity was automatically included.
According to your theory the waitress should have done a wonderful job since she was getting 18% right?
(When I asked where she was so I can thank her I was told that she went home 90 minutes earlier.)