For us my wife wanted nothing more than to stay at home and be the major carer but continued to work PT. I am the breadwinner by a long chalk but we pool our finances. She has equal (and unquestioned) control over everything and we share as much of the housework as is practicable.
IMHO the imbalance in finance is an irrelevance as 'we' decided to start a family. However, we have done everything possible to ensure the financial stability of my family, should I pass unexpectedly or we ever part company (in terms of savings/trusts/property etc).
As I have girls it is imperative that they see equality in the home so that they grow up with that as a norm. I am only one of two dads that have this attitude although my mate does not pool finances.
Otherwise the outlook is pretty bleak and I am openly critical of my other mates, at least 5 of which, who treat their wives like s#it. Many still give their wives a pittiful allowance, do no houswork, cooking and have never fed kids or changed a nappy. In this respect I despair for my own girls, who I hope will find the right man that doesn't take the complete pi$$.
I don't know what can be done TBH other than change male attitudes (I never thought I'd say such an obvious thing on a feminist board lol). Some men 'squirrel' money away secretly in fear of giving it all up, should the s#it hit the fan (a lot of men are genuinely scared of being taken to the cleaners upon divorce). Perhaps a mandatory split (in a similar way that I run my finances) would ensure that both parties save and accumulate wealth equally throughout the relationship.
I'm not sure about the work thing. I thought the gov were moving toward more flexibility for both but this remains to be seen.
Although my wife is working I have mentioned additional training if she wants to pursue an alternative career when she decides to go back to FT. Perhaps offering SAHP greater training opportunities/refresher courses etc. would enable parents to go back to work more easily.
Sadly there is always going to be a risk, unless both parents work but IMHO it is necessary to have a major carer, whether father or mother. Personally i think the benefits of having one parent at home outweighs the risks of splitting up but that's my opinion.