File photo of Berkshire Hathaway Chairman Buffett wandering at the company trade show before his company's annual meeting in Omaha

 
File photo of Berkshire Hathaway Chairman Buffett wandering at the company trade show before his company
Berkshire Hathaway Chairman Warren Buffett wanders at the company trade show before his company's annual meeting in Omaha, Nebraska in this April 30, 2011 file photo. Increasing taxes on the wealthy would bring fairness to U.S. taxpayers across the board, billionaire investor Buffett said on January 25, 2012, backing the tax reform that President Barack Obama proposed in his State of the Union address. REUTERS/Rick Wilking/Files (UNITED STATES - Tags: BUSINESS HEADSHOT PROFILE SOCIETY WEALTH)