The subject of the pay again. She makes it sound like it’s David’s fault.

That’s your interpretation, but not mine, and not the majority’s, and certainly not Gillian’s.
During her press tour for We she clearly tried not to mention his name when she talked about equal pay, and I think it was not to drag him personally on this subject.
When she talked about negotiations, she clearly stated that David and his team do all the hard work and she comes after and ask for the same.
David’s birthday tweet last year was him acknowledging her negotiations issues and giving her a little public push.
She wouldn’t dig him, she has no reason to, and David isn’t responsible for that. Fox and society in general is.
David and Gillian’s relationship is sane and free from all jealousy and anger due to money. They’ve both acknowledged that many times.