TD I just watched the Sandberg video. She makes a lot of sense in what she says, women don't put themselves forward and underestimate their abilities. Men put themselves forward more, or certain men do. I think that's right. She talks about position rather than wealth which is fair enough, although the two are obviously related. But I guess the problem with the observation that women are not assertive enough is that the implied solution is that women need to change to succeed in the system. What about changing the system so that it suits the predispositions of women instead?
Certain feminists would argue that the goal shouldn't really be to get equal numbers of billionaires, but to reorganise the system in its entirety so there are no billionaires. It depends on whether you think capitalism itself is a patriarchal system. In which case getting women to conform so they can do well within the system is not real change.