Really? FIFA was shoving wads of cash into brown envelopes and renting apartments in Trump Tower - for dogs.
Bribery is generally not sophisticated. Especially at the levels the CIA could give a shit about, bribery is an open secret and part of what the ruling classes expect, or at least condone.
Embezzlement- yeah that's hidden. Which is why congress pays whistleblowers. I mean the U.S. Is ridiculously out in front for these sort of things (well officially, I am sure bribery and corruption is still common)