many workers get no wage, or below minimum, and business owner promise them they will be paid tips instead, so tipping is a part of our culture, Rabbi Belsky’s note posted is very helpful.
I know a frum head counselor in a hotel program, who was promised it would be tips only, but they will be generous, she worked hard for entire Yom Tov, and a mother of 5 kids (some are special ed, where it was not easy to cater for them for so many hours) said hotel owner told her tipping was optional, so he tried to be nice to guests, and the worker, a frum person, was taken advantage of.
tzaar of someone who is not paid/ underpaid, and looking forward to be made whole, as misrepresnted, is not a small thing.