A global governance scheme can more easily be enacted once commerce operates on a global currency. It's just the first step. The new currency will require new laws in order to regulate all of the business transactions that take place on a global scale -- they'll have to put in place a code by which those who make transactions will be punished or rewarded according to their adherence (or lack of it) to the new laws. This will of course become politicized, with corrupt anti-capitalist ideologies incorporated into the laws. The power to set the "values" and "morals" behind those laws will be left to those who control the money. By extension, all of us as consumers will have to abide by these laws. Hence, global politics means the U.S. will lose its sovereignty as it bows to the whims of those fashioning the scheme, with an elite few in control and the rest of us left to either abide by the regulations or forget about buying anything from anyone. The intention is to make the U.S. less influential, weaker, and beholden to outside forces.