The realistic alternative is multigenerational family units sticking together.

Grandparents help raise the grand kids instead of day care and baby sitters. Kids take care of their aging parents. Communities pull together to help each other.

There are complexities to it, but without a lot of the artificial financial structures that we have in place (loans, insurance, stocks, government programs) that’s probably what society has to revert to and in many ways it’s the most efficient long term way for society to function.