I think that psychopaths operate on a sliding scale within our world and while many are fortunate enough to have the skills to raise themselves up into 'powerful' positions, many too take their place among the normal men and women operating in everyday society. These are the ones that will surely be exposed by the introduction of a fully transparent society but I still maintain that those at the very highest echelons of society who have the most psychopathic tendencies in defense of their positions now and in future, would still manage to bypass the system and even come to control it as has always been the case.
I would also add that while it is a very difficult thing to prove as you say, it is pretty obvious to anyone with eyes that not only do some companies and agencies target specific individuals for their psychopathic tendencies, in a lot of cases the training of new employees of many organisations these days is done in such a way as to train them to into learned psychopathic behaviour. Organisations, for example, such as the Police, I would suggest. :(