Dick's actual prophecy was not about drugs destroying users — it was about data collection destroying the boundary between the watcher and the watched until both experience identical neurological dissolution.

The surveillance apparatus in A Scanner Darkly doesn't observe addiction.

When Fred/John wears the scanner suit, transmitting his own movements back to himself through a government intermediary, he doesn't gain clarity — he fractures. The doubled consciousness that results — knowing he's being watched while watching himself be watched — reproduces the exact dissociative architecture that Substance D creates.

Both make the subject unreliable to themselves. Both weaponize self-awareness against coherence. By the novel's end, Fred can't distinguish his own motivations from monitored behavior, not because the drug erased them, but because the documentation made authentic interiority impossible — the scan didn't reveal Fred's guilt, it created it by making observation the primary fact of his existence.

The addict and the surveilled citizen both lose the ability to distinguish between performing for the apparatus and acting from desire, both report symptoms to authorities, and both gradually internalize that reporting as the only coherent self available. Dick wasn't warning about Substance D — he was warning that total visibility would produce the same fragmentation, the same loss of agency, the same inability to trust your own testimony that addiction produces.