A FB friend share this post at The Economist, which notes:
"If female employment rates matched those of men, GDP would increase by 5% in America and 9% in Japan by 2020, according to a report by Booz & Company, a consultancy."
True. But presumably you could also say that increasing male employment - thus widening the the gender gap - would increase GDP as well. I don't think people would take that as a very good argument for deliberately widening the gender gap.
I'm not saying this to be dismissive of the goal. I do think the disparities are real (see my post earlier on Horwitz's video), and that there are things to be done about it. I just thought this was a funny way of putting the argument.