If you are an average straight white man, yeah, it sure looks like things aren't getting better. Your wages haven't increased much at all (adjusted for inflation) since the '70s.
And yeah, women and the gays and men who aren't white (though, I think it's mostly women; there are just so many more of them) are making gains every day... if trends continue, it won't be much longer before those people make as much as we do! and now they want to be treated with respect, too? Christ, when will it end!
I mean, sure, I laugh at those who have this 'white rage' for complaining that we, as white men, are now expected to treat other people with a base level of respect (as that, at root, is the intent of political correctness.) - At least where I live, this expectation is phrased more like "Please consider that women are humans too, you know, if it's not too much trouble" than anything really threatening to the status quo.
But there are a lot of people who feel genuine rage. And I don't know... My own opinion is informed by the fact that I make really good money and work in an industry where I get a really obvious (and fairly large) bonus for being a white male. Would I feel that rage if I had to struggle to make ends meet? If I had to seriously compete with women in the workplace? I like to think I wouldn't, but who knows?