[tomp]

Although I disagree with your assumption (that it's valuable that men and women are equal in every, or at least this particular, dimension), I want to point out that you're forgetting another option - to make women (mothers) more economically valuable (so they compare favourably with fathers / childless individuals). You can simply reward companies whose employees have children! This would also correctly incentivize hard-working smart people to procreate (if rewards are proportional to taxes/salaries).