It occurs to me that now work is also seen as 'career' rather than 'punishment' that gendered retirement age in many professions would aid equality at the top - and by that I mean retirement gendered so that women retire later.
If men retired at 60 and women retired at 65, positions at the top would open up earlier, and women could have 5 more years progression OR 5 years maternity/childcare career plateau compensation (ie allowing a real choice rather than an enforced choice re children and career).
I know this would be a struggle to get through equality legisislation but there is no doubt that maternity is used as an excuse for lower pay, slower career growth etc - wouldn't it be interesting if that excuse was taken away??