I just don't get this. If you don't work as many hours/years (nowhere near that of men), how can you expect to retire with the same amount of money??
A solution might be for women to work longer? They live longer (fact) compared to men, on avg 3 years. Maybe women can work 3 years extra. Towards the end of their career they probably are on their highest wage, which would help address the "gap". Will probably get crucified for even suggesting this.