Let me start by saying I am totally supportive of equal pay for equal work. Two people doing the same job, with the same education, the same experience, and in the same region (I.E. one isn't in rural Arkansas and another in San Francisco) deserve to make the same money. One shouldn't make more or less because of gender, ethnicity, sexuality, or anything not of their own choosing.
However; that goes out the window when it comes to the entertainment industry.