FZ's replies sound great to me. I was going to say that Syme was doing it simply because its what he has to do. The state has complete control (almost) and everyone does their job... I didn't think to bring inthe double think thing, so FZ's reply captured the concept better than mine probably.
as for the double plus stuff, does being able to express 'perfect' actually help us in anyway? I mean, really, what does 'perfect' mean anyway? Because whenever we use it, we most certainly aren't using it true to its definition! So we are really just saying that it is 'really really really good. Like, as good as we can imagine'...well, amybe doubleplusgood could be made to mean its equivalent?