I like that

Carlin cared a great deal. His whole career was about bringing things to light. He was just cynical and vulgar in his presentation.

Ya'll are all wrong. Tipping is to compensate the 2 dollars they make an hour. It's a shitty system, but that's the deal. If you don't want to tip then don't go eat at a restaurant that supports that system. It's not some luxury add-on for excellent service (though it can be). It is purely to make up for the extremely low wages. Does anyone remember the rest of the dialog in this scene?