Kudos to Gasparino. There’s more that Buffet should have to answer for regarding his pronouncements versus his behavior. Such as his advocacy for high estate taxes while pledging to avoid them entirely by gifting his money to the Gates Foundation Trust - where Bill Gates has also removed his future estate from tax liabilities he too advocates.
Giving it away isn't the only sign of his hypocrisy. He also owns life insurance companies who sell their products as a means to avoid the estate tax. How much less would his insurance companies be worth if there was no estate tax and how much more would they be worth if the estate tax was much higher?