Orwells paranoia undermines the point of the book for me. He is too caught up in making his point repeatedly that he sacrifices the actual plot of the book.
"Brave New World" is, in many ways, scarier.
There may be no need for such measures as are shown in 1984, because it is uneccessary. We become de-sensitised, as a result of media saturation. Not only that, but as a society, we are very trusting. We think that some parties are better than others, but trust the system as a whole. We are convinced that our democracy is a fantastic system, with a occaisional flaws, but nothing major.
I find it more likely that such control could come into place simply by people not caring. As long as the standard of living is OK, and we are convinced that we have a good system, we are happy to be distracted, and leave things to other people. Take ACTA for example. Every time there is a thread on it, people just say "It'll never pass, nothing to worry about" etc. A valid viewpoint, but one that, if everyone shared, would lead to nothing being done.