This seems more a problem with capitalism/human nature than a racial thing imo. Might be my interpenetration but this what I think you're saying, In this feudal like system we have tiers at which some group of ppl have to occupy for the entire system to function. The elite class is majority white because they made the system, so its only logical they put themselves in the highest tier. Also, its only logical they would like to keep themselves in this class because it doesn't make sense to purposely increase the difficulty/discomfort of ones own life, so out of this human physiological necessity they use their power as the elite class to prevent, or make it difficult for them to lose their tiers which in turn means keeping the lower classes stuck in their shyt tiers to prevent competition for that number one tier.
Also, it's only logical with how this system is design at this point that any presence of an outside group that is perceived different, i.e appearance, religion, region entering this system will have to start at the bottom tiers. Blacks for historical reasons were locked in the lowest tier because of the ruling class perceived them as most unlike themselves, and had pretty much zero opportunities to move out of their tier without somehow weakening the differences they shared with the elite which explains why light skin blacks historical had it easier when it came to mobility within this class system, and how the Irish, Italians, Polish, and Germans surpassed blacks within the system too.
Fast forward to 2015, now, I want to beg the question how has the system changed since its inception, if at all? Do you still think our system is design in way were the Elite class can prevent, or control the lower tiers from moving upward? I think you would agree socially and economically influence is linked to getting a good education for the most part because that can lead to higher chance of finding a good job. Back than the ruling class probably made this the least possible to ppl who they viewed as different, which by human nature was racial differences, but in today world could you make that claim?
This is were I think me and you differ greatly! I don't think the elite can get away with riggin the game like they once could. They have to compete for their spot now, and i'm not sure race is the key variable that separates tiers anymore, but instead its poor vs rich type of thing. The nobels don't want to give up their spots to the peasant, and it just so happen, based on the past model, that blacks occupy that "peasant" tier; however, with the modern system it isn't up to rulling class anymore. They can't stop us from working hard and getting a good education to get better jobs and grow our influence. Well, that's how I see it.