Steve Bee is calling for the simplification of pension tax relief, arguing all savings should be taxed at their deferred rate when drawn as income.
Tagging the rate of tax in this way would wash away the controversy caused by the reliefs available to higher rate taxpayers, who are seen to benefit the most under the existing model.
The move would also help basic rate taxpayers who, though benefitting from the relatively-new 20% rate today, have no guarantees it will remain at that level in the future, he said.
Bee's comments follow a suggestion from the Pensions Policy Institute that tax relief has failed as an incentive to encourage saving, while the Conservative Party's 40 Group called for the abolition of higher rate relief.
"Higher rate taxpayers get 45% or 40% tax relief by deferring income but can end up paying just 20% on it when they draw it as a pension. This is where, commentators argue, the unfairness lies.
"To me, though, it's a pointless argument. There is no reason why each and every tranche of pension saving could not be tagged with the rate of tax that was deferred and that will one day need to be levied when that money is paid out as income in the future. Deferred at 45% in 2013? Taxed at 45% when you take it back in 2043.
"It's a system that could work well for basic-rate taxpayers too. The 20% basic rate of tax is comparatively new in the UK and there is nothing to say that it will remain at this rate."
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According to Salisbury House Wealth