Oh, and the 10 was an upper bound. If it's 3 that's even better - women are even more of a limiting reagent and they have less of a evolutionary need for massive amounts of wealth.
My theory is that there are two types of fundamental 'evolutionary units' that are important when discussing humans. Memes, and genes. I agree that, when memes were unimportant, the genetic influence, for females, of an outstanding capability to provide, would be largely wasted.
However, massive wealth only became possible once human culture grew, and then, for reasons I outlined below, memes became far more sticky, more influential, and more important, by comparison. In this, women have a greater evolutionary incentive to gain wealth or prestige or spread memes, but not a greater genetic incentive.
