That's mostly self-serving bollocks. If such observation is so good then it would be essential to let everyone know what is being observed and how. Secrecy works against such claims.
Cold war espionage was a very different game. If observation had been so effective, the US would not have built so many nukes - or perhaps the secrecy of such observation allowed the US hawks to spin and get the level of overkill the US eventually achieved.
Perhaps if you stopped treating the rest of the world as your enemy, we'd trust you more with this shit. But Snowden has shown we must not.