The thing with racial preferences is a very sociological concept of race, plus your example introduces poor vs. rich classism. That's why I am very skeptical when it comes to science investigating race. The history of science and racial biology isn't that great.
"The thing with racial preferences is a very sociological concept of race,"
It can be used to right a wrong but also abused. This is true of race, religion, gender and now we have sexual orientation.
The fun of using such begins when these classifications overlap and have conflicting propositions.
For example requiring a Christian church that abhors homosexuals to hire them. =8-O