> class may be a more powerful organizing discourse

Yes! Yes! Yes!

Other things contribute to class, but it remains a class issue.

I'm reminded of this: "If your feminism isn’t intersectional, it isn't feminism.".

We need something similar for those who think the issue is one-dimensional - "the poor".

Because why someone is poor, and what conditions and circumstances result from being poor... poverty (which includes the psychological impact of being poor)... deeply affect the individuals affected, and some of those factors have wider societal causes (racism, homophobia, xenophobia, perceived sex, sexual identity, etc).