"I have sympathy for underpaid workers."

...but they should feed me while I do nothing to help them, instead I'll be here actively enriching the people exploiting their labor.

"But I don't think I'll change my tipping attitude just because you said such and such."

I'm sure that sounded cool in concept, but basically all this says is that you find the idea of changing your mind due to dialog silly. How sad.

"Actually your commands sound a bit condescending"

Oh wow, I hope my analysis doesn't come across like that. You might stop tipping - oh, wait...