FROM CNN's Jack Cafferty: With the U.S. drowning in a monstrous $13 trillion national debt, it's clear we need to consider any and all options to stem the tide. This may be an idea worth taking a look at… then again, maybe not. [cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2010/images/06/17/art.gates.jpg caption="Bill Gates"] A group of 51 German millionaires and billionaires … Continue reading Would a voluntary millionaire's tax work in the U.S.?