Common sense would say actors want to get as much money as they can.
Also I don't know of a situation where actors dictate the terms, the producers and directors do.
caught The Parole Officer (2001) british comedy with Lena Headley, easily one of the worst movies I've seen this year.
Actually when I first saw Game of Thrones not too long ago part of my immersion was immediately ruined when Theon Greyjoy appeared. Couldn't help but think "Thats ****ing Yatesy from Plastic(another bad british film)" and immediately I knew he was gonna be a conniving betraying sob... lo and behold..