The 9–9–9 Plan, a centerpiece of Herman Cain 's 2012 campaign for the Republican Party 's nomination for president of the United States, was introduced in August 2011.ccording to the analysis of Howard Gleckman the Tax Policy Center, When you get right down to it, Cain’s [9–9–9] plan is a 25 percent flat-rate consumption tax — not all that different from the FAIR tax that he says is his ultimate goal.