Despite brand new tax rate reductions of the Jobs and Growth Tax Relief Reconciliation Act of 2003, the superior marginal tax bracket for many retirees can be a whopping 46.3%. Why? Because Social Security benefits are subject to income tax bill. Those affected are Social Security recipients who have enough good fortune (misfortune?) pertaining to being subject to both the 25% tax bracket as well as the 85% inclusion rate for Social Security benefits. Americans usually have the benefit of...