For some reason, Americans have developed a stereotype of "white" and "black" that is related far more to social class than anything else. When you say "white," we imagine someone from the middle class. When you say "black," we imagine someone from lower socioeconomic status. How many blacks are in the middle class, I'm not sure, but as for whites in lower classes, we have them coming out our ears. While we may have millions of blacks who live in ghettos, we have 10 times as many whites living in trailor parks.
Because of our confusion between ethnicity and social class, we end up with things like Dave Chappelle's "Racial Draft": http://www.thecomedynetwork.ca/blogs/2013/06/chappelles-show-june5-racial-draft
While amusing, it highlights the real problem, and this false stereotype is widespread throughout American culture.
I recall an interview with Bill Cosby, talking about educational advancement among black children. Peers discourage each other from studying because it's "acting white." When in fact it is "acting middle class," because this same kind of discouragement occurs among lower class whites as well. As long as education is not valued within any group, that group will have difficulty being equally represented in white collar industries.
What we have to work out to explain the disparity between population demographics and white collar job demographics is the proportions of the underrepresented groups who discourage education. People like Jesse Jackson want to make this all out to be the result of prejudice on the basis of genetics or skin color. Honestly, I think we're long past that. There are still plenty of racist bastards out there, but in general, we do not have pink people acting intentionally or unconsciously to undermine the advancement of brown people when it comes to getting college degrees.
It's not PC to talk about genetic differences, but genetics is interesting. Geneticists have identified differences between different ethnic groups, and they have correlated them with some minor differences in physical and cognitive adaptations. Things like muscle tone, susceptibility to certain diseases, social ability, and other things have been correlated to a limited degree with variation in human DNA. But the average differences between genetic groups are miniscule compared to their overlap (statistically, we have very small mu / sigma for basically any meaningful measurable characteristic).
Thus I can only conclude that correcting any disparities must come from within. Regulating businesses won't do any good, because unqualified minorities will end up getting unfairly hired and promoted. We have to start with the children and get them to develop an interest in science and math. If Jesse Jackson wants to fix this problem, he need to learn science and math and start teaching it. I assure you, even at his age, he has that capability, if he just cared enough to do it. Unfortunately for him, if he were to corrupt himself with this knowledge, he would find himself taking a wholly different approach than the "we're victims" schtick he's played most of his life. Personally, I prefer the "the universe is awesome" philosophy held by Neil deGrasse Tyson. He's one of my biggest heroes, having nothing to do with his skin tone.
One last though: I'm sure someone will find something racist in what I have said. Either that or I'm being too anti-racist and appear like I'm overcompensating. There are also aspects of these social issues I know nothing about. I'm just writing a comment on Slashdot that is about as well-informed as any other comment. One thing people should think about in general is whether or not they have hidden prejudices. It's not their fault, having been brought up in a culture that takes certain thing for granted. Instead of burying our heads in the sand, we should be willing to admit that we probably do have subconscious prejudices. That's okay, as long as we consciously behave in a way that is fair to other human beings, regardless of race, gender, sexual orientation, autism, or any other thing they didn't choose to be born with (and plenty of things they have chosen, because it's people's right to choose).