Has David ever said anything about Gillian being paid less than him? I wonder what his opinion is.

He did, but it was years ago, back in the 90s, and his answer is still a painful souvenir I try to forget.
I don’t think the new and great version of David was ever asked, and I actually wish he would be, because I’m sure he would have a lot to say about it, and he would be genuine and thoughtful. I’m basically sure he helped and helps Gillian with her negotiations as much as he can. He even helped Mitch by announcing his character was going back on the show before he signed, and then was all about “fuck Fox!”. So definitely, I wish someone would ask his opinion on this topic.