Help!

Has anyone out there any idea about someone working within some auditing branch of the US government who was fired for telling either a Senate or Congressional committee that sometimes it was more cost-effective to not monitor for fraud than it was to catch every cent lost (or something like that)?

If you do know what I'm talking about can you leave a comment or email me (putting the '@' back in!)? I recall someone mentioning it at a conference, or reading about it in a book, but can't find any word of it now. Silly me for not noting it at the time.