Xenia - Working full time won't necessarily help anyone long term if they don't want to be away from their family for 5 full days per week. Given the long hours culture in many organisations full time workers often have a poor work life balance. That in itself can cause stress, lack of motivation and committment etc.
What percentage of fathers for example have decent quality time with their children during the 'normal' working week? Most I know leave the house before the kids are up and don't get home until early evening when the children are often in bed. This doesn't benefit the father or the children in question - however much he earns or how powerful he is.
Sexism won't be eradicated or even probably reduced in our lifetime. Its nothing to do with whether females work or not.
I don't agree with your comment about having equality in the home if she works. Again, whether you work or not shouldn't have a bearing on that. Equality to me is about committment to one another, the way you treat each other, how much you care etc - NOT about how many hours you work or how much you earn!
If you want to work full time and feel that the benefits of the money you earn and the status it gives you in the home far outweigh the effects of not being the main carer for your children thats a personal choice which no one should knock.
I agree that more men should apply for flexible working rather than the women. It happens in my organisation but there is a stigma attached to it that needs to change for many employers.
Don't try and make it into a crusade about equality for women. Finally, the comment about doing yourself a favour in the long term by working full time is a bit patronising. Not everyone has a choice - many women have to work full time and be away from their children when they don't want to so how can that be doing them a favour (apart from paying the bills)?