I've had nasty arguments with people I know that work waitress jobs. They feel entititled to the customer paying the hidden fees of their wages instead of demanding their employer pay it. If they work at a good restaurant tips can bump your pay up significantly so of course they want to keep it all.

The thing waitresses miss in all of this is that they're just a face for the product made by other people. It's the same with sales and commission. They're ignoring the hard work of others to claim they deserve the extra wages because the carried a tray, filled some drinks, and spend their smoke breaks complaining about awful customers.