"Brown's mistake" has already been reversed

The personal allowance has grown to undo any losses the abolition of the 10p rate inflicted.

Ed Miliband has committed to introducing a mansion tax, and using the money to fund a re-introduction of the 10p tax band, saying:

We would tax houses worth over £2 million. And we would use the money to cut taxes for working people. We would put right a mistake made by Gordon Brown and the last Labour government. We would use the money raised by a mansion tax to reintroduce a lower 10 pence starting rate of tax, with the size of the band depending on the amount raised. This would benefit 25 million basic rate taxpayers.

The original 10 pence tax band was applied on incomes between £0 and £2,230, once the personal allowance was taken into account. Its abolition was used to fund the reduction in the basic rate of tax from 22p to 20p. But while Miliband says he will "put right [the] mistake made by Gordon Brown", he's not going to be reversing the basic rate cut. Instead, the money will come from the mansion tax.

But the Social Market Foundation's Ian Mulheirn points out that that mansion tax is not expected to raise anywhere near as much as two per cent on the basic rate of tax would. He tells me that their expectation for a mansion tax on houses over £2m is in the low billions — probably around £2bn or £3bn.

But every billion pounds raised would only pay for a 10p tax band of between two and three hundred pounds, he says:

We've got about 30 million income taxpayers in the UK, once you take the personal allowance into account. Assuming that they all would benefit by the full amount, then if you've got £1bn to play with, you could have a tax band of about £330.

A tax band of £330 would return £33 to each taxpayer. If the mansion tax raises the high end of estimates, then the band could be around £1000, returning £100 to each taxpayer. That's not to be sniffed at, but it's less than half of the size of the abolished band. It's not putting right Brown's mistake, but it ameliorates it slightly.

But actually, Brown's mistake has already been largely put right.

In 2007, the last year of the 10p tax rate, the personal allowance stood at £5,035. With the 10p band on top, basic rate tax started at £7,265. Uprated for inflation, that will be worth slightly under £9000 in the tax year starting in 2013.

In that same year, the personal allowance will stand at £9,440. Someone who would in 2007 have been paying only the 10p tax rate is today paying no tax at all. Miliband's actions, if introduced in 2015, will likely introduce a reduced tax rate for people earning between £10,000 and £11,000 to complement a zero tax rate for people earning less than that. That's likely a good thing; but it's a new thing, not a reversal of Brown's actions. They have already been undone.

Of course, if you have to delve into uprating tax bands by inflation to prove a point, it's not going to fly very well in political debates. That's why, as George writes, politically, the move is a masterstroke.

Brown walks through Rugby. Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

Photo: Getty
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The Future of the Left: trade unions are more important than ever

Trade unions are under threat - and without them, the left has no future. 

Not accepting what you're given, when what you're given isn't enough, is the heart of trade unionism.

Workers having the means to change their lot - by standing together and organising is bread and butter for the labour movement - and the most important part? That 'lightbulb moment' when a group of workers realise they don't have to accept the injustice of their situation and that they have the means to change it.

That's what happened when a group of low-paid hospital workers organised a demonstration outside their hospital last week. As more of their colleagues clocked out and joined them on their picket, thart lightbulb went on.

When they stood together, proudly waving their union flags, singing a rhythmic chant and raising their homemade placards demanding a living wage they knew they had organised the collective strength needed to win.

The GMB union members, predominantly BAME women, work for Aramark, an American multinational outsourcing provider. They are hostesses and domestics in the South London and Maudsley NHS Trust, a mental health trust with sites across south London.

Like the nurses and doctors, they work around vulnerable patients and are subject to verbal and in some cases physical abuse. Unlike the nurses and doctors their pay is determined by the private contractor that employs them - for many of these staff that means statutory sick pay, statutory annual leave entitlement and as little as £7.38 per hour.

This is little more than George Osborne's new 'Living Wage' of £7.20 per hour as of April.

But these workers aren't fighting for a living wage set by government or even the Living Wage Foundation - they are fighting for a genuine living wage. The GMB union and Class think tank have calculated that a genuine living wage of £10ph an hour as part of a full time contract removes the need for in work benefits.

As the TUC launches its 'Heart Unions' week of action against the trade union bill today, the Aramark workers will be receiving ballot papers to vote on whether or not they want to strike to win their demands.

These workers are showing exactly why we need to 'Heart Unions' more than ever, because it is the labour movement and workers like these that need to start setting the terms of the real living wage debate. It is campaigns like this, low-paid, in some cases precariously employed and often women workers using their collective strength to make demands on their employer with a strategy for winning those demands that will begin to deliver a genuine living wage.

It is also workers like these that the Trade Union Bill seeks to silence. In many ways it may succeed, but in many other ways workers can still win.

Osborne wants workers to accept what they're given - a living wage on his terms. He wants to stop the women working for Aramark from setting an example to other workers about what can be achieved.

There is no doubting that achieving higher ballot turn outs, restrictions on picket lines and most worryingly the use of agency workers to cover strikers work will make campaigns like these harder. But I refuse to accept they are insurmountable, or that good, solid organisation of working people doesn't have the ability to prevail over even the most authoritarian of legislation.

As the TUC launch their Heart Unions week of action against the bill these women are showing us how the labour movement can reclaim the demands for a genuine living wage. They also send a message to all working people, the message that the Tories fear the most, that collective action can still win and that attempts to silence workers can still be defeated.