“Foreign Ministry guys don't become agents. Party officials, the Foreign Ministry nerds, tend not to volunteer to Western intelligence agencies.”
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There are so many things a large intelligence espionage organization can do to justify its existence, that people can get promotions for, because it could result in results.
I found that our Soviet espionage efforts had virtually never, or had very seldom, produced any worthwhile political or economic intelligence on the Soviet Union.
The Soviet Union did not achieve victory over the West, so was my information inadequate to help them to victory, or did it play no particular role in their failure to achieve victory?
Let's say a Soviet exchange student back in the '70s would go back and tell the KGB about people and places and things that he'd seen and done and been involved with. This is not really espionage there's no betrayal of trust.