One paper examining a sizable sample of business folk found that percentage of sociopaths in the corporate world is 3.5 times higher than in the general population. Another study of 346 white-collar workers found that the percentage of corporate sociopaths increased as you go up the corporate ladder. That’s consistent with the reasons why politicians tend to be sociopaths: corporate leaders have lots of power over others and arguably even less need for empathy and conscience than politicians.
Concern about sociopaths applies to both business and government:
http://thinkprogress.org/justice/2014/01/09/3140081/bridge-sociopathy/