I heard a discussion on Fox News Channel a while ago in which British PM Gordon Brown was quoted as calling for a "global New Deal."
I can well understand why Brown would call for such a thing, and it is epitomized in a quote by Margaret Thatcher: "The problem with Socialism is that sooner or later you run out of other people's money." Clearly, the British government is running out of money and it is looking for other pockets to pick. The USA is still relatively productive so that is the direction Brown is looking.
People like Brown, and the people who administer the United Nations, are the best argument there is against a "global governing body."