I mean, it's hard to say whether two different actors really perform the same job; speaking for myself the only name I recognize in that article is Christian Bale's. Plus presumably they all have representatives that negotiate their cuts, so if they agreed to work for that amount, I don't think there's much room to complain. Finally, I can't really tell if there's a trend here. The article talks about the cases of three men and three women, where all three women are paid smaller cuts than the men, but is this the case for everyone else as well?