This catchphrase was around a long time before the 1976 movie All the President's Men injected it into the popular culture. Since then it has become a cliche, shorthand that the source of much wrongdoing (particularly white collar) can be found by tracing the flow of money.
There's a Holzerian corollary, applicable to the former director of the FBI: "Follow the ambition."
Mr. Comey not only spent almost all his legal life in the prosecution business, he climbed a predictable ladder to the top: Assistant United States Attorney, United States Attorney, Deputy Attorney General, Acting Attorney General, Director of the FBI. Awaiting him just above the last rung was the Nirvana of the prosecution business: Attorney General of the United States.
But how to get there? Simply by the sweetheart deal he made last July by deeming the next President of the United States to be a criminal who had not committed a crime. (See my previous blog).
But in the end, having sold his soul (see, e.g., Faust, The Devil and Daniel Webster, A Man for all Seasons) the top rung was not strong enough to bear the weight of James Comey's ambition.