They really need to tax this man, he's even on record saying how he needs to be taxed more.
Berkshire the company is one of the US's biggest taxpayers. Buffett himself is giving most of his money to charity (the Gates foundation).
So yeah, prob that's not charity too... it's just a way to get the maximum available tax cut, you donate to your own or your friends charity and he or she funnels backs the money where you need it to be.