That is the hook for them. They ALL think that they will somehow be part of the "Inner Party". How could it be otherwise?
What they don't know is that they will be treated the same as all the other Proles, because only a small percentage of the total can be "Inner Party" members.
And if you aren't IN that club...you are OUT. You will be dragged away in the middle of the night just like everyone else, and you will scream (as Solzhenitsyn describes in "The Gulag Archipelago") "ME? WHAT FOR?"
Leftist Cannon Fodder (Useful Idiots) are drawn in the same way people are enticed to participate in Ponzi schemes, thinking they will all get rich together, but in this case, it isn't primarily personal wealth that draws them in, it is the part of them that needs to belong to a group and have power.
It reminds me of the articles in Readers Digest about the educated elite in China who were send out to the country side to scoop manure after the revolution.