The problem is the real world has a nasty way of destroying the best laid plans. What's fair for one person isn't fair to another. What we have right now is a commercial venture with a coercive morality twist, and it's clear some of the male players (interestingly Federer agrees with Novak on the player share argument, although not the gender one) see a lot of unfairness and presumption in the current system.
We can try to impugn their motivations and call them selfish (as I recall one poster from earlier in the thread has seemed to be doing), but personally I don't think that's the case. These guys work their socks off from childhood to be the best at what they do, if I were in their position I would be quite offended to see people like us, who sit on our couches and watch them play, imposing their own arbitrary values on how these guys should feel. This brings me to the man-woman thing.... it is the nature of the sport that the men compete for their own title and the women compete for theirs, they therefore create their own separate and distinct narratives and the unfolding dramas dictate the interest in the respective tournaments. The moment you have these competing narratives you simply shouldn't - in a meritocratic system - impose the same prize money, it would be the opposite of fairness.
Don't get me wrong, it makes sense politically, it makes sense to send a message to society about the values we would like to teach our daughters and sisters. But it makes no sense whatsoever meritocratically. Don't get me wrong, I am not one who assumes that the men should be paid more, I would just say they should be paid what they're worth. Now a politician would say that they are worth an equal amount. That's politics, and it's a politics I believe in by the way. But look at it from the commercial perspective of a sportsman who has a short shelf life of earning power. They are conducting their business, their efforts are part of a commercial venture, not a politico-moral one. If one tour is generating the bulk of the commercial interest then that tour should be rewarded for it, we shouldn't impose a rule where one tour effectively subsidises another. If society wants to add it's own fairness component on to prize money then those who feel strongly about equal prize money should put their money where their mouth is and make a contribution to the less commercially successful tour's prize money bucket. I suspect we all know that even the strongest advocates for equal pay would not make the contributions necessary to right what they perceive as as a wrong. The very folks who would argue that men and women should be paid the same prize money would still pay more to see the men play, I know, because in the past I've been one of those people!
Let me ask this question (and this is what changed my mind), if gender wasn't a part of the discussion, would anyone of us really dispute what the men want? Imagine squash players arguing that squash pros should be paid the same amount as tennis players because their sport is just as good as tennis? Crazy right?