It doesn’t seem logical to me that any legal definition of the value of household work would ever be more than half national median household income. Even that is pretty extreme. If a stay at home worker sucked that off median household income families below and at the level and for some $ above would be doomed.
A person managing household investments in community is getting half the gains already.
Stay at home parents should be grateful that their partners consider them to be pulling their weight. The deal the stay at home is getting ,if they in fact they want to stay home, is better than good.