Not sure about never been done in real life - some of the Provos and Unionists in Northern Ireland pivoted their cell structures from terrorism to profitable crime when peace broke out.
(Btw, you've been shadowbanned a while ago. I'm only mentioning this, because your recent comments seem sane as far as I can tell.)
I've only ever heard it on an episode of Monty Python. Wonder if it's just a UK thing.