I think the discrepancy has more to do with that men are tougher negotiaters than women, when it comes to discussing salary.
Yes, that's another part of the reason. Another reason is that corporations are slow to adapt to the changing make-up of employees. For example, corporations often reward people for simply how long they've worked in a company, meaning that taking a few years off work to start a family costs a women a lot more than it ought to, if the company had rewarded them for
talent instead. It's easy to see why corporation's do this -- years worked is an easy, lazy proxy for experience, and experience is an easy, lazy proxy for ability. It's much easier to increase someone's salary by 2%+inflation per year than it is to have a manager have a tough conversation with their employee, and reward people who have genuine ability. But in many corporations (and actually in most of the public sector), that's how pay increases are rewarded. It's not explicit discrimination - it's just really bad management practice.
And if you think that that only exists in "old fashioned" or "poorly managed" companies, even modern, fast paced companies are also guilty of not responding to a changing workforce. Most companies expect high flyers to work long hours, in many different departments, and in many different countries. It wants workers to be in the office at a drop of a hat, and abhors "casual hours" or working from home. That makes it very difficult for women to start families.
But it's not like that is inevitable. That's not the only way to work. Barclays Bank, for example, offers up to 5 years off for any employee, with a guarantee that they can return to the same job at the same salary. And many other firms offer similary packages. So who do you think a high-flying professional who wants to start a family is going to work for?
So, aneeshm's partly right -- there
are companies that offer packages more suited to women, and they are being rewarded for that. But he's also quite wrong to put forth such a stark, extreme, black and white scenario, because that's just not the way the world works......