I appreciate your Orwell quote (I've read the book literally dozens of times), but would like to point out that, in the case at hand, the goal is to limit freedom not by reducing the vocabulary, but rather by constantly expanding it - to the point where intelligible discourse (and even thought) become arduous and/or nearly impossible.
Imagine, if you will, the near impossibility of substituting a good, meaningful English sentence like
"Independent, hardscrabble yeoman farmers are the backbone of American society; to deny them their Right to bear arms would emasculate the Nation."
with some "Politically Correct" version.
Of course, it would be possible to "translate" the individual words - but much power and meaning would be lost, and the Language Police themselves are working to continually sanction previously acceptable words (q.v. "gentleman of color," "Colored," "Negro," "Black," "Afro-American," "African-American," "Person of Color") and re-draw lines so that the average speaker has to be constantly on guard about expressing himself.
Regards,
Well, like Newspeak, the new words are out to destroy the old and to narrow the thinking.