True enough, BB, but there are huge numbers of parents, including those who own and manage these firms so if it became a cultural norm that both parents can take leave, do you think perhaps some of those attitudes might change?
DH and I both worked for the same firm when I got pregnant. We were on the same salary and almost certainly could have elected to do a job share post DC if we had both wanted to. Our boss is a father himself and very sympathetic - as he was from the moment I told him I was pregnant and continues to be supportive ie giving DH the day off with no fuss when he needed to look after DD while I was in hospital. This is a small business, but our boss shows with the right mindset, it's perfectly possible to be flexible.
In answer to noodle I agree that many women will prefer to be SAHMs given the choice, but as you see above, DH and I had an equal opportunity to be SAHPs and although DH was more than happy to be a SAHD, he acquiesced to my own preference to be SAHM for the time being. We didn't fall out about it, just discussed what we wanted and came to an agreement.
So now we live on one salary and although we live in Spain where the cost of living is a bit less than in the UK, DH's salary is fairly modest even by Spanish terms. But we're not extravagant people and we're happy this way (DH's job has a 9-day fortnight with most of the office time done in the mid-afternoon - evening so he still gets to spend a lot of time with me and DD).
But yes, neither of us is currently paying into a pension and that is one aspect of the set-up that does concern me.