I think if you're looking at the readership of those papers, i.e. the middle classes, then a lot of women DO choose to stay at home with children etc. When I was at university I was surprised by the amount of girls who didn't especially want a high-flying career, but did want to marry someone rich. Of course they did go into careers, because it's unacceptable for middle class girls to just say 'Actually, I'm just going to marry someone rich' after all the effort that has been put into their education. But that was undoubtedly the aim.
The fact is, if you marry someone rich you can have the exact same lifestyle as them without having to do the mad City hours. It's perfectly socially acceptable to choose to be a SAHM to small children. Sounds like a win-win situation - unless your husband dies or becomes ill or, in the immortal words of scottishmummy, 'wallet runs off with a twinkie'