the tax policy center link says this
"Below are distributional tables for tax year 2015 for the variant of the Bowles-Simpson "Chairmen's Mark" that would eliminate all tax expenditures except for the child credit and the earned income tax credit, eliminate the alternative minimum tax and the phase-outs of itemized deductions and personal exemptions, and replace the current six bracket individual tax rate schedule with a three bracket schedule with rates of 9 percent, 15 percent, and 24 percent (from "Co-Chairs' Proposal: Draft Document", November 2010, page 24, line 4 on table). The proposal would also use the chained CPI to index tax parameters, increase the Social Security wage base by 2 percent per year more than the growth in the average wage (making the wage base $140,000 in 2015) and phase in an increase in the federal excise tax on gasoline of 15 cents per gallon (13.5 cents per gallon on average in 2015). Finally, it would reduce the corporate tax rate to 26 percent and eliminate corporate tax expenditures."
http://www.taxpolicycenter.org/taxtopics/bowles-simpson.cfm