If a policy benefits poor people in general and more black people are poor it would stand to reason that it would help more black people. I think that the problem with AA is that it attempts to treat the entire country. A better solution would be to concentrate efforts on the poorest communities with the largest percentage of black population. Once those cities start to succeed it would help turn around institutional bias. I don't thank that AA has helped reduce bias, it seems like it has served more as a cosmetic measure. I could be wrong.