A friend in Southern California worked for a restaurant in Disneyland. Her employer calculated what they felt each waitstaff should have earned and had all of them pay up for sub-tips go cooks and busboys. Refusal to do so was grounds for termination. She had several days where the end of the shift had her net pay her employer due to non or low tipping that day.

That was grossing up for her. Illegal? Likely. "But they have laws against that" - low wage employees are easily taken advantage of. They often _need_ that job.