Most people in positions of power have strong sociopathic tendencies. It's just that many of them conform sufficiently well with society's expectations that they're not recognized as threats.

And when you do recognise a sociopath with power as a threat the smartest option is to stay the #@$@# away!

Use of the label 'insane', among other things, means "I have the social resources to call you insane and get away with it".