Most members of SAG are not highly paid. The median income for an actor is $43,760, and even the 75th percentile is only $60,760. The numbers for SAG represented actors is similar to these numbers. The thing is that not all tech employees are paid the same, nor should they be. Google and other similar companies often times pay multiple times the median tech salary.

[1] https://money.usnews.com/careers/best-jobs/actor/salary