Slighty related, but Senator Bob Menendez was just indicted for taking bribes from people connected with the Egyptian military [0]. Gotta say, the Egyptian intelligence services are definitely punching above their weight by regional power standards. [0] - https://www.politico.com/news/2023/09/22/egypt-guns-money-me...
At a federal level law/power is continually traded for cash/favors. Heck, DoJ itself gets deployed in response to lobbyist demands (eg:copyright enforcement).
From what I see this case was egregious and involved a non-favored foreign state. Maybe that's the bar at which DoJ begins to care about political ethics.