Steve Forbes: Perry’s flat tax ‘most exciting tax plan since Reagan’s’ Zachary Roth October 20, 2011Steve Forbes, whose flat tax plan helped make him an unlikely contender for the Republican presidential nomination 15 years ago, is praising a new version of the idea from Rick Perry. And Forbes, who says he helped devise Perry's plan, left little doubt that he'll formally back the Texas governor before long.In an interview with Yahoo News, Forbes called Perry's proposal, announced in a speech Wednesday, "the most exciting tax plan since Reagan's," in 1980.Asked whether that included his own 1996 plan, Forbes said it...