People mistake the parasites plans for having only one possibility and one line of action.

They take years and years to subvert and makes changes to society and that is the real work they do, they put you in a situation of fucked if you do and fucked if you don't.

If things go alright (for them) they can keep the madness and change society the way they want without "reversing". If they see they need to "reverse" then they will reverse! They win both ways.

their success was in their decades long achievements.