It doesn't really matter to me - I just don't know why they can't say something like -
"I have enough money now - I don't want to work at this job any more."
"I am tired of playing this character - I don't care how much money they are willing to pay me."
Maybe they can't say something like :
"The working conditions here are terrible and I can't stand my co-workers"
"So-and-so is getting paid a lot more for a lot less screen time and I am peeved."