https://www.sagaftra.org/production-center/contract/810/rate....
If you are celebrity equivalent of a developer, then you can get paid more. There are no real restrictions. You don't see famous actors getting paid below the daily minimum. When they work for a big budget film they typically get x multiple times the daily rate. Also, if they want to work on an indy film they can agree to those minimum daily rates as well.
I think its flexible enough so if you want to work for a nonprofit you can just accept the daily/weekly minimum vs asking full price if you work for FAANG.
I don't think it's a crazy amount of protections but it sets aside a basic set of standards you can expect from job to job.
If your are making over 120k they suggest actors create a loan out corporation at that point...
https://firemark.com/2015/01/12/should-you-have-a-loan-out-c....
Can you imagine all the FAANG companies having to setup a Software Industry Association to negotiate with a Software Developers Guild every year? It seems plausible. It's probably in their best interest as well. These companies could just dump any social issues on to the union and just focus on making profits. The ability to lock out competitors might force other big software dev employers to join the association as well.