I don't agree that mothers, or fathers, should be given more help to stay at home, and I can't understand the reasoning behind that argument at all.
Why should we pay for mothers to stay at home? Children of SAHMs do not have better outcomes than children who have been in childcare, so there is absolutely no benefit whatsoever to society from it.
If there's no benefit to society, why should society pay for it?
People need to stop harping back to the days when a postman's wage could support a wife and three children along with paying off a mortgage. Times have changed and it's a huge luxury to be able to not work.
I'm not saying that SAHPs cant contribute to society, they can and quite often do through PTA and community voluntary work. But then so do working parents, and across the two voluntary jobs I have, the vast majority of volunteers work full time.
Having a SAHP has no advantage to anyone except the individual family themselves, so they should be the only ones expected to pay for it.