Palm Beach billionaire Jeff Greene, who made his fortune by betting against homeowners in the mortgage and credit crisis, has been mouthing off about the lifestyle that the rest of us enjoy. He thinks it’s too much — even though he owns America’s most expensive single-family house! The former U.S. Senate wannabe took advantage of his presence at the Davos World Economic Forum in Switzerland to tell a worldwide audience via Bloomberg News that we, the common people, need to have fewer things. ... Greene is also known in these parts for making contractors who work on his $36 million-,...