Corporations are just starting to wake up to the fact that certain classes of people with personality disorders are rather good at clawing their way to the top, only to destroy or maim their organisations before they are found out. You are going to hear a lot more about this in the business press.
Sunfish
I find your assertions regarding individuals with Personality Disorders, in particular Narcissistic Personality Disorder, to be inaccurate and irresponsible. Any personality disorder is defined by severe social and
occupational dysfunction, making it difficult to believe they would be successfully negotiating any kind of "perfect management climbing". Unless you are a qualified psychologist or psychiatrist (which i doubt), i suggest you are not in any position to be making such crude generalisations about people with mental illness.
However, if you like, you could provide us with a reference, so that the credibility of the information you have referred to can be ascertained.