I understand that in the novel series that sort of setup was encouraged by institutions (there is a vague mention of taxes), and in The United States this is se

I understand that in the novel series that sort of setup was encouraged by institutions (there is a vague mention of taxes), and in The United States this is setup is disincentivized by institutions. However if greater than two parent households was a genuinely preferable way to live I would expect more people to choose that lifestyle now.