I don't see this as an issue to be resolved by government but an evolution required within our personal relationships with men, and how we make choices together which benefit children.
To me this would be more around a modern review of marriage, what it is and how it works.
Where it's now understood women have choices and opportunities, but as only women carry the burden of preganancy and birth, and as more women than men are likely to choose not to work or not prioritise work after children, women have a financial risk which requires protection.
I'd advise no young women to have a child without being married first, and to not get married without a clear understanding with a man that whichever role each parent takes, finances are fully shared for the interests of the family unit.
I'd advise young women to get much more rational, ruthless, and in control of the expectations of relationships, before they have children, and to use the legal protection of marriage for this.
This would protect women and benefit children. Men who wanted families with desirable women would have to step up to the expectations to get this.
I don't think it's a SAHM vs a WOHM issue, women will always vary in their choices on this, isn't that what feminism was for? And there's more than one way to successfully bring up children.
It's a women and men issue, we need the next evolution in these relationships, away from the 'every adult has the right to follow their dreams' culture which is disastrous for children, and more to a 'we commit to a partnership which we contribute to equally, if at times differently, for the benefit of the family' culture.
Which would protect women and benefit children.
I know this sounds like just a return to some traditional template, but it's not, because now young women have education, careers, and the power to make choices about when to have children and the type of mother they choose to be. It's just a recognition that some of the previous protection and leverage was thrown out with the bathwater.