[Iftheshoefits]

One thing I learned in the briefings I saw after getting my clearance was that the single biggest motivator for betrayal was a thrill-seeking narcissistic personality, followed closely by political agendas. Financial (including bribery/blackmail) and romantic blackmail concerns were so tenuously correlated as to be laughable to suggest they are meaningful as a potential exploitation.

Also, polygraphs are pseudoscientific nonsense.