Comment by gchamonlive

Tips are the most cynical thing I've ever seen.

Tips are supposed to be "in return for a service, beyond the compensation agreed on" (WordsAPI).

If tips instead mean "it's something you have to give when you had no problems with the service provided", and you expect routinely not to have problems with such service providers, then it's implicitly agreed that tips are required, so they are not tips anymore.