Effective personal tax rates from 2011-2012

From Greg Hands MP in the committee debate on the Finance Bill on 19 May:

'... Phasing out these allowances, probably more than anything else, has added massive complexity to our tax system. One way of evidencing that is to look at the profusion of marginal tax rates expected to be within the system from 2011. Using current income points, which may change by 2011, we see 11 different effective tax rates, including National Insurance contributions: from an income of zero to £5,715 there is an effective tax rate of zero; from £5,715 to £6,420 there is an effective tax rate of 11.5%; from £6,421 to £6,745 it is 50.5%; and from £6,746 to £18,023 it is 70.5% [sic]. It then falls sharply to 31.5% for income between £18,024 and £43,875. It then goes back up, so for income between £43,876 and £50,000 it is 41.5%. Between £50,001 and £58,170, it goes back up to 48.17%, but, between £58,171 and £100,000, it goes back down again to 41.5%. Between £100,001 and £112,950, it reaches its highest rate of all of 61.5% before going back down to 41.5% in the penultimate tax bracket of £112,951 to £150,000. The final rate, for those earning over £150,000, reverts to 51.5%. That is a total rollercoaster ride ...'