Those are the ones which are relevant to what I am talking about. If you feel I didn't bring up something relevant, feel free.
But as far as I can tell, it would not be difficult for you to ask a waiter, "do you have to make up your pay in tips because you get less than minimum wage?" You just are assuming they won't say to you because of how you look for some reason.
Well I admit I missed you aren't in America. But this whole thing has literally been about minimum wage waiters having to make up their pay with tips in the U.S., so...