you're right (as usual), issymum, in that this might kick off...
but not imvho that it is a wohm v. sahm debate - i will have to keep working no matter what - the issue for me is how much time i put into career v. family, the career sacrifices that entails, and on the other hand the material sacrifices it entails...
i go back to my earlier point - to my mind our family's dilemma wouldn't be an issue if it were dh who did my job and vice versa - he is a very hands on dad who has cut down his working hours to spend more time with the children, but he would never go p/t. i am the main earner in our house, but i have done it. in how many households where the man is the main earner would this happen?
likewise the debate about splitting p/m/aternity leave? the answer is always "what's the point, the man would never do it, the family would lose too much money..." hello, er, yes - i can confirm that the household breadwinner loses a fortune if they take unpaid maternity leave!
although having got on my soapbox about that, to vickiyumyum's point, i'm sure there are lots of families out there who couldn't "permanently afford it for both" whatever the split of earning power - that's the nub of the gist for us...
imho, it's a one way street (pmsl again at the notion that you could send a child who had been privately educated at primary level to one of the local comps - hohoho!) - i just can't commit to 17 more yrs of working in the city. if i don't private education isn't an option - end of story.
to go back to the original point of the thread - that's why we can afford nursery now, but can't/won't commit to private education.
now if there are women main earners out there (issymum ) who feel completely comfortable with their career choices and are prepared to sign up for the long term - well, that's nobody's business but theirs... certainly not mine, good luck. i plan to make different choices, that's all.