In the US the two are intertwined because historical discrimination produced reduced chances for black people to make it into the middle and upper class, and this is a generational effect. Consequentially things that discriminate against the working class will also discriminate against historically discriminated minorities.

I don't think there is a way you can assert hiring practices that discern based on economic status are de facto racist in the modern US. That seems to be quite a stretch. In fact, many of the practices at large organizations are designed expressly to favor historically discriminated populations - and in other cases historically discriminated populations don't need an artificial advantage and have outpaced other populations on their own merit.

> I don't think there is a way you can assert hiring practices that discern based on economic status are de facto racist in the modern US. That seems to be quite a stretch.

It meets the "disparate impact" criterion, which is the legal bar for racism.