My very-fast two cents -- I'd go with a theme that is totally removed from any historical reality. I'd give this game a pass because it seems to imply, yet again, that Left Wing equals good and Right Wing equals bad, and I lost my patience with that BS a couple decades ago. In this particular instance, the Communist Threat was very real, and many of the people Hollywierd's continually presenting as innocent absolutely were not. (Start here in your research of opinions not approved of by the celebrity marketing machine: http://www.amazon.com/Joseph-McCarthy-Reexamining-Americas-Senator/...)
Short version: do you really want to go there?
Yes, my limited experience with Paranoia (the RPG) back in the day (read the rules, played an online campaign) was that it was a quite silly and quite non-politically specific parody of the paranoia of living in a totalitarian society, but the totalitarian society's actual political structure ("left" or "right", as if politics is a simplistic 1-dimensional spectrum to begin with... but that's a tangent) was quite undefined and unimportant... and could be left to the imagination of the players as desired. Which if viewed through a specific lens can apparently invite projection of one's own political hot button issues: the rules to your Paranoia pyramid game prompting Kell to a vigorous defense of Joseph McCarthy's activities and insistence on the real dangers of the Communist Threat was... rather surprising to me. :)
The game rules you linked to are rather verbose with flavor text, a turn off for me, and the game doesn't appear to be my sort of "pyramid game" (what with the diplomacy/role-playing and need for creating custom cards, etc - it seems more of a boardgame version of Paranoia which just incidentally happens to use pyramids). I'm more into the abstract strategy type pyramid games mostly, so I am probably not in the target audience, alas! Good luck with it, in any case!