In Ben Macintyre’s The Spy and The Traitor he goes into detail on Aldrich Ames, a double crossing CIA agent who sold out US soviet assets to the Soviets (which led to 10 being executed) in exchange for Soviet cash. I think Macintyre called it one of the largest betrayals in US history.

He did this because he was struggling with personal debt and his new wife had expensive taste.

Feels like there should be a lesson in there somewhere.