Independent contractors brought in by upper management under the auspices of "streamlining work flow", but in actuality to suggest what positions can be eliminated thus reducing headcount and overhead for purposes of downsizing.
In the movie "Office Space" the characters referred to as "The Bobs" are classic examples of chainsaw consultants. The main character avoids being fired through a combination of unexpected brutal honesty about his lack of passion for his position, and also engendering camaraderie with those sent to determine if his
job is really necessary.
Free him, he did nothing wrong!
Chainsaw Consultant is overrated.