I think research has shown that wealth/poverty has a bigger impact on life prospects than other characteristics (race, sexuality and even sex).
That certainly accords with my own experience and observation.
I tick quite a few "boxes" - immigrant, mixed race, woman in a majority-male job subcategory, and I was one of very few girls taking my subject at uni. I had a single mum growing up.
Frankly, that same single mum was a high earner, and as a result I've coasted through life with ease. I'm not white but I'm aware I'm certainly more privileged than the majority of white people, men and women.
Edit to add - my point is, I've sat through a lot of EDI training crap that never touches on rich/poor, ever.