Do credit card reward systems subsidize the rich at the expense of the poor? There has been a lot of press over the last week about a new research report out of the Boston Federal Reserve that claims that credit card payments are a form of regressive wealth transfer, taking money from the poor in the form of higher prices and giving to the rich in the form of credit card rewards. But before we all start crying foul and cutting up our credit cards, let's put down our pitchforks, take a deep breath, and think about this. It's...