Yes, it does technically fit "racial discrimination." However, some people use that simpler term to talk about historic and current power imbalances. In the United States, there were a lot of extra barriers for non-white people. Some still exist, but there's also the self-perpetuating barriers, like how children from poor households are likely to be poor adults. So, if somebody wants to help solve "racial discrimination," being "race blind" would mean letting past wrongs stay wrong.
Where does education fit in in your assumptions ? Even poor people make it up the social ladder thru education. Most of our ancesters were farmers, and most of them very poor too.
In the United States, there were a lot of extra barriers for non-white people
Join us in Alabama! Here, they put up barriers for everyone that wasn't a large landowner or industrialist. This set back descendants of black slaves, but descendants of white sharecroppers were equally caught up in the net. Arguably, the poor whites were worse off - every black guy realized they were being oppressed, but a good number poor whites had the wool drawn over their eyes.
