I think you are missing a big point about the psychology of people in general... We tend to surround ourselves with people of have the same likes and dislikes as we do... For example, I had a boss who was a womanizer, golfer, and a drinker and he surrounded himself by the same kind of men. These guys fit into his social circle. I survived only because I of my performance value to him. NOW, at the management committee level there could is probably a common thread that binds the decision maker(s) to the others. There could be political, religious, fiscal as well as racial, (etc., etc.) overtones that attracts and binds people together. This is human nature.
You can justify this anyway you want but if you look inside yourself, you will see that you and I do the same thing. Our closest friends and people we associate with think and act like us to a large degree!
Let's take Japanese business.... up until recently, you probably never worried about your ethnicity in that culture. If you were anything but a Japanese male, forget about it! LOL! I am not trying to make disparaging comments about Japanese.... I am just trying to take the focus off of the white male and show that this happens everywhere.
Look at the Fashion industry - Is there a typical profile you can point to? How about professional sports? etc etc etc. What binds these people together? For those of you who have to pick a thesis to write on, this may be a very interesting subject to tackle!!!!
So, what I am saying is that change is slow going depending on who is in charge. The fact that this topic comes up repeatedly, shows just how deep racial and ethnic tension go. It is my contention that until most of Americans are homogeneous, America will not be able to have a true identity of and for itself. It may take hundreds of years. For this to happen world wide it will take generations beyond that.