Annie Lowery of the Atlantic explains how the rich benefit at the expense of the poor
                                
                                
                                    (Newser) -
                                    People with comfortable incomes tend to pay off their credit card bills every month to avoid fees and interest, plus they collect cash-back rewards, travel points, and other perks to boot. These people, explains Annie Lowery at the  Atlantic , are known in the industry as the "transactors." To...