The glass ceiling is also complete bull. Equality does not mean equality of outcome, it means equality of opportunity. In western society, women have the same opportunities as men, and the only things that affect the outcome is their choices.
The wage gap argument was disproven because of several factors: men are more likely to ask for a raise, men are more likely to stay at work than go home to care for family (like, say, during a time of illness), men take fewer days off, men work more overtime, and so on. In this research following up the argument of there being a wage gap, they also proved that this is what's "keeping women back" - it's nothing to do with men going "ew they're women those are icky", because that literally does not happen (and it's illegal). What it has to do with is the choices that women make in regards to work.
So when person #1 and person #2 with the same resume apply for the same higher position, but the boss knows that person #2 is more likely to take time off, more likely to leave work to care for family, and other such things, then in the interest of having the position held by a person that is willing to work hard in it, the boss is going to give it to person #1, regardless of the sexes of the two candidates. It's economical common sense.
The whole question of why there is a "wage gap" or a "glass ceiling" has already been answered: there is none. The only way the outcome of individuals is affected is by the choices that individuals make. Unless you are going to tell women to start acting more like men, or men to act more like women, this is the best that is possible.
But if you are going to fight for more female CEO's or politicians or whatever, even when those women don't work in the same way their male counterparts do (or even have the same interests/knowhow for that matter), then you are asking for women to get special treatment. Apart from that, it's sexist, because it's saying that women are unable to achieve and hold these positions of their own accord.