They might claim they do, on their paperwork, website, etc. But what is the reality when they're actually in the air? Do you think stewardesses on these private jets are really in the habit of making demands of their multimillionaire customers? Somehow I doubt it.
Don't know why you're being downvoted- in my experience you are 100% correct. Also, having a flight attendant on a private jet is pretty rare. It's usually 2 pilots and drinks are self-serve. Depends on the size of the jet and whether you request one, though.
