Tom Cruise gets accolades because he gives Million$ to the cult, and like any generous and famous benefactor, he gets showered with attention and acclaim. He's their prize calf and they intend to keep him well controlled and in the fold. He doesn't see the treatment that happens to others, most of these celebs don't see it because they are coddled.
You may be right that Tom doesn't know, but somebody on one of the episodes said he has to know that the people who clean his house, detail his cars, etc., are all working for less than minimum wage. Obviously, I don't know the man. But it wouldn't surprise me if he justifies the discrepancy by reasoning that the servitude is helping the others "grow".