Any decent waiter knows about how much you make, how often you dine out and your marital status by the time you are halfway to his table. By the time you sit down, he's already performed the necessary calculations to know the approximate size of the tip.
So he is more worried about his tip than how well he serves you. Then he shouldn't be a waiter.
BTW If a lowly waiter is able to ascertain all this information only from you sitting down at a table, the waiter should be working for the FBI as a profiler of serial killers!