At this time Osborne expressed an interest in the ideas of "tax simplification" (including the idea of flat tax). He set up a "Tax Reform Commission" in October 2005 to investigate ideas for how to create a "flatter, simpler" tax system. The system then proposed would reduce the income tax rate to a flat 22%, and increase the personal allowance from £4,435 to between £10,000 and £15,500. However, the idea of a flat tax was not included in the 2010 Conservative Party manifesto.