Indeed. The "big name" actors need the union the least. The fact they support the union indicates they know how tough it is for most actors.

Exactly, I think stories like this one might surprise people a bit

https://ew.com/tv/mandy-moore-pennies-for-this-is-us-streami...

tl;dr - Mandy Moore (a very big name celeb) talks about receiving residual checks of 81 cents for her show that streams on Hulu. I'm not interested whether or not she's rich and doesn't need the money, but if she's being paid fairly with regards to value she's providing.

Personally, if my contributions were bringing my company an incredible amount of revenue, I would be annoyed if I wasn't being paid accordingly.