He has clearly benefited from knowing people in the top political offices. His company owns shares in Bank of America, Wells Fargo, and has owned shares in Goldman, some of the too big to fail banks. Berkshire also owns Moody's that certified crap investments as AAA.
"It's not personal, it's just business."
There's another perspective to your statements. People in top political offices might be trying to benefit from knowing Buffett, but it's hard to see how they've profited. Meanwhile in 2008-09 his phone was ringing off the hook from execs trying to figure out how he could put his $20B of liquidity to work for their shaky corporations. Buffett was under heavy pressure from the Treasury to "save" Lehman Brothers, and as a Berkshire shareholder I'm glad Buffett wasn't interested.
Before Goldman he invested in Salomon Brothers, and I'm sure the Goldman execs remembered what happened when Buffett took over at SB. He invested in BofA because they were begging for capital, and they're certainly paying for it. He invested in WF on the open market, the same as anyone else who was willing to accept the incredible sector risk.
Buffett also owns half as much of Moody's as he used to... maybe less than that. He's been divesting their shares for years.
Before you make more blanket statements from websites with agendas to grind, I'd suggest reading a library copy of Alice Schroeder's "The Snowball" biography. It shows what kind of "person" Buffett really is, and what terrible life choices he's made to get to where he is today. He gave her full access to his memories and to interview his family/friends, and she wrote up all the ugly facts. In return he cut off all contact with her-- he just can't face up to her analysis of his personality.
Buffett really can't help being the analytical investor that he is, and he plays by the rules as hard as he knows how. He's insanely competitive in a way that borders on the Asperger's-Syndrome accusations that made Gates so competitive at Microsoft. The difference is that Buffett also campaigns to have the rules changed so that everyone can have a better game, not just him. Until the rules are changed to make a more equitable playing field, he'll continue to exploit every loophole for the benefit of his shareholders-- and also to call attention to how ridiculous the loopholes may be.
If we're going to judge Buffett's scorecard by the billions that he's accumulated, then perhaps it's also fair to adjust his score by the billions that he's given (and continues to give) to charity.