So if a woman is a doctor or has a high paying/high status job, she still wants a man who is above her? That's the problem with feminism and socially engineering society to put women in high-status occupations, it messes with the ecosystem of dating and reproduction.
I don't agree with negging at all, because it's going to severely limit your choices. A chick with low self esteem that is use to feeling inferior will stay with a dude that puts her down, only because she's going to put herself in a situation she's comfortable in. But a woman with self respect probably isn't going to enjoy being put down constantly.
I don't believe that you have to make a woman feel inferior for her to be interested, in fact, the super hot chicks that get with dog ugly dudes are doing so because those guys worship them. No one likes a rug, but people enjoy feeling wanted and supported. If a woman feels beautiful around you, and has fun with you, why wouldn't she want more of that?
Another mistake we as men can make is assuming that women are vastly different than we are, but other than social expectations and anatomy, we're all just people. If you could choose to be in a situation where people appreciate you and make you feel good about yourself, or you could be in a situation where you were constantly being made to feel inferior, which would you choose?
Negging really isn't my thing. I prefer being classy and treating women good. That may come as a surprise in light of the OP (where I make it seem like I only care about sex), but one of my major points is that it's totally possible to be a great guy and get the girl.
Like I said before, I understand that everyone has their own way of doing it, negging just isn't me.
EDIT: I'd also like to elaborate a little further and ask you guys how you want your daughters to view themselves? If your wife is constantly belittled by you and your daughter witnesses that, she's going to think that's normal. Then, when she's dating, she's going to seek out someone who will treat her the way you treat your wife. Wouldn't you rather your daughter is treated like a queen rather than a subject? The girl you're dating is someone's daughter.
I know I'm coming off as a bit contradictory here, but honestly, I don't treat women bad, I just know what I want and go after it. Sex is perfectly natural and an excellent part of life. There's nothing wrong with maximizing your chances of getting laid, especially since it's enjoyable for both parties involved, and especially since you can do it without being dishonest or degrading. I much prefer a chick to feel good about the fact that she just came all over my midsection than feeling ashamed for her moment of weakness.