The spook that was given as an example in that text, James R. Lilley, sounded familiar to me. I looked him up and saw that his career continued well after the time of that article, being made ambassador by Reagan in '86.

http://en.wikipedia.org/wiki/James_Lilley

The article, among other things, confirms that Lilley was a CIA operative. I don't know for sure but it seems like that information was far from public knowledge in 1974.