I don’t think there’s necessarily a conspiracy to withhold info about spies who might have psi. That just seems too easy. When you think about it, if spies did have psi abilities, the canniest among them probably wouldn’t talk about it. They’d be lone wolves, reading minds and gathering info at a distance. And in a world where espionage is often internally divided, that would be their secret weapon to stay on top of the heap.
Let’s just hope that if psi spies do exist, they’re on the right side.