True enough... but like a lot of subtexts (!!!!!!!) it can be read several ways. Kneale was speficially referring to British fascism, the idea of clamping "top secret" on something to keep people away... and home-grown Quislings going along for the ride as long as they were getting paid ("We keep our mouths shut, same as in wartime, see?"). That it's creepy to non-British viewers just shows that he was tapping universal fears.