Just a mosquito bite for him.
He owns the electric grid across five States, having the power of thumbscrews over his native Nebraska. Nevada home-owners fed up with his high rates, started installing solar panels for some relief. So he lobbied the Governor of Nevada to slap a surtax on solar panels so that his revenue stream wouldn't take the hit. Nebraska has gotten significantly poorer under his thumb. Now that the State has approved the construction of the Keystone Pipeline, he's going to become even richer. It may be bad news for Nebraska, pipelines rupture and the State is a source of several major aquifers. How much will Buffett kick in if raw bitumen gets into Nebraska's groundwater? It could contaminate the water system all the way to New Orleans.
Buffett is capitalism at its most cut-throat, I won't even get into his conduct during the Financial Meltdown...he no JP Morgan.
This is only half the story.