The OCD that drives them to hoard vast amounts of money, also makes them control freaks. They aren't going to wait for the government to do their job and protect anyone from anyone. They are actively weakening America, and other countries, just so the governments will be corrupt enough for the Psychopathic Oligarchs to bribe their way to anything they want, but still be too weak for the govt to fight back when they finally realize they've created a monster.

And eventually, after they all have trillions of dollars, with trillions more pouring in, it won't be about making more money, it will be about taking the other guys' money. By then, governments will be irrelevant, and we will be back to monarchies, and the expense didn't keep the old European kings from warring with each other.