Dilbert's popularity with its emphasis on incompotent managers making bad business decisions which the employees then have to fix is one example of the proof you seek. If the issue didn't exist everywhere, the readership for the cartoon would be tiny.

Paul Babiak, an industrial and organizational psychologist, and Robert D. Hare, the creator of the standard tool for diagnosing psychopathy, explore the infiltration into today's corporations by psychopaths, or those with destructive personality characteristics that are invisible to many with whom they interact in Snakes in Suits: When Psychopaths Go to Work, which is available at http://www.amazon.com/Snakes-Suits-When-Psychopaths-Work/dp/0061147893/ref=sr_1_1?ie=UTF8&s=books&qid=1249303003&sr=1-1.

Now ask yourself would 2 noted psychiatrists be writing a book about sociopathic managers if there wasn't a problem in American corporations?

Sometimes your only choice is to walk away from a bad boss. Unless you are a psycopath yourself and then we can discuss entirely different ways to eliminate the situation...