> Genuine question: why does it need to be investigated? Is there a law against rich psychopaths being psychopaths with their own money?

Because if there isn't, there should be. It's not good policy to let psychopaths run amok. An investigation is the kind of thing that could get the political wheels turning against those "rich psychopaths."

But I wouldn't be surprised if something like this is illegal already. It has a smell of anti-competitive collusion.