I haven't watched this show since around the second season, but I was wondering why they left after I saw the news.
fukked up situation. All it would have taken was some solidarity from the two leads because 10-15% is already really damn close so I can't see a reason why CBS wouldn't have buckled. 20% or more, yeah, but what they were asking for probably wouldn't have equated to more than 20-30k more an ep which isn't a lot for a show that's an international hit.
Still...
The other half of the story is probably that Caan and the Aussie
didn't want them to be paid the same since technically they do carry the show, but at the point where you're all probably clearing 100k+ an episode, who gives a shyt.