[nylonstrung]

There are obviously real benefits to being legally married.

That said the #1 reason that marriages fail is finances and I can imagine divorce would be massively net positive it if alleviated the financial desperation this family feels, allows them to spend time together vs working overtime and gives them healthcare they wouldn't have access to otherwise.

The downsides of not being legally married honestly seem trivial in comparison to the realities of poverty.

[anigbrowl]

I concur about the corrosive effects of poverty, but it seems to me that you're ranking different circumstances in a one-dimensional utility calculus, and I'm arguing that many aspects of a long-term relationship are orthogonal to each other.

Marriage and family are contexts within which people are willing and/or liable to make life and death decisions which transcend fiscal considerations. The combination of a tax code and economic circumstances that (perhaps unintentionally) incentivize the breakup of families and the loss of rights for short-term economic reasons is not politically sustainable.