Service workers are low income by choice. Why should I subsidize their poor life choices? I chose to study, work several jobs simultaneously and take out loans to get to my current income level. And now that I'm successful I should spend part of my income to subsidize theirs. I already pay higher taxes to support their poor lifestyle choices. Come on, this is 'Merica! Everyone can be successful! Leaving a tip is no different than welfare. The more I tip the more I'm encouraging them to not better themselves.

Btw: the preceding was a joke, I Tip generously.