3 ideas
A state aiming at total control cannot stop at behavior and speech, because it will always suspect that disloyalty and prophecy hide where surveillance cannot reach. The Tabir Sarrail makes sleep an administrative territory by collecting, filing and classifying dreams. This removes the last space a subject could consider private and makes even involuntary inner life potential evidence.
The master-dream is not found in the raw material. It is produced by whoever controls the chain of selection and interpretation, and by the factional struggles above that chain. Because any dream can support many readings, the institution's real power lies in deciding which reading becomes official. That turns 'interpretation' into a weapon while it presents itself as neutral discovery.
Each worker in the apparatus sees only a fragment: a file, a symbol, a routing decision. So no one can clearly say they caused the outcome, yet everyone's routine work produces it. The insider is both protected and consumed by the machine, and advancement can come as a reward for harm done to one's own people. The institution will eventually require your participation whatever your origins or loyalties.