Indeed, there's a whole host of reasons why sociopathic / psychopathic traits (such as the ability to lie credibly and manipulate others generally) enable people to ascend to positions of leadership in businesses (and hence, are represented in these ranks in higher numbers). See e.g.:
http://www.forbes.com/sites/victorlipman/2013/04/25/the-dist...
Add some plain greed on top of that, and you'll end up with a lot of people. Grandparent is very naive.