I agree with your last sentence, elegran, but I think the current leadership (note for possible misunderstanders: I said leader_ship_, not leader, though he is included in the term) behave as if they believe that the two parts of that sentence should be the other way round. i.e. they do seem to see the Party as some non-evolvable organism.
There is an interesting article by Daniel Finklestein today about why 'true' socialism always ends with the Stasi.