i believe that its not the power, as you described,that asian females are attracted nor they are thinking about their children haveing better future if they had some "white" / "black" or whatever, blood in them. I beleive it is this way because of the their cultures. Most asian cultures pressure their kids (if they allow dating, etc) to only date male/female from their own cultures. I.e. indian/indian, or japanese/japanses etc. They are especially hard on females. Due to this restriction, when female dates a white or black or any other race than of their own, it gives them a thrill. Its psychological thing. You are forgetting that most people on top positions are asians (i am not being disrespectful towards any race). Therefore your theory of females being attracted to "white" or "black" is null. About 25% of CEOs,CFOs, etc,. positions are held by indians and others.
Now about white males, white males have constantly dated white females (subtitute black if you would like) ever since they have started to date. Most of the white (black) females know of their rights and know that they can leave their "man" at any time, since their backgorunds do not see this as a shameful thing to do. However, other cultures i.e. indian or japanes or chinese cultures see this things as a condition of humiliating disgrace to their famalies. Therefore, white/black men have learned (the once that want a good girl from a descent background) that asian females are far less likely to break their hearts.
BTW i am an asian indian and have dated girls from many background, white, iranian, indian, etc. And have faced many problems with dating asian girls, mostly family problems. I have got tired of this problems thus i look for girls that do not have any dating problems.
I suggest you watch eddie murphy raw comeday you will understand this better.