I agree that some women have reasons why they want to work (even if the hubby can afford the family), especially if they want to pursue a career that they've been wanting before she enters into a motherhood stuffs. But I don't believe that the greed for power (as what I understand askme wrote here). Well, maybe it's 'pride' but not all women think the same.

"I do live by the motto that pessimists are usually right, but all the great change in history was done by optimists" -Thomas Friedman