Margaret Thatcher memorably described New Labour as her "greatest achievement". In the same spirit, Labour can greet George Osborne's announcement  that he favours "above-inflation increases" in the minimum wage as a remarkable act of political flattery. When Tony Blair and Gordon Brown introduced the policy in 1999, the Tories rejected it as a jobs killer; they are now competing with Labour to promise the biggest rise. There is no better example of how Miliband's party has shifted the centre ground to the left.
But in both its content and its timing (the day before Miliband's long-trailed speech  on the economy this morning), Osborne's gambit is uncomfortable for Labour. It is a reminder of the biggest advantage that a government has over the opposition: while the latter can only talk, it can act. But Osborne's move also opens up new political opportunities for Labour. If the Tories want to enter a bidding war with the opposition on living standards, Labour should be confident that it is one it can win.
Having shifted from denying the living standards crisis to seeking solutions to it (while attempting to blame  the last government), it will become harder for the Tories to fend off reminders of how much ground has been lost since 2010 (with the average family, as Labour never lets us forget, £1,600 a year worse off). After the biggest fall in real wages under any government in recorded history  and the retoxification of the Conservative brand through the abolition of the 50p tax rate , the danger for the Tories is that a rise in the minimum wage just looks like crumbs from the table. While the Conservatives enjoy a convincing poll lead on the economy, they have long trailed  Labour as the party that would do most to improve family incomes. Osborne's announcement might have left the Tories in a better position than before, but they will still struggle to win an election defined by living standards. A tactical victory could become a strategic defeat.
By conceding that a rise in the minimum wage (which has fallen back to its 2004 level) would not cost jobs and would have a neutral effect on the public finances (with the anticipated fall in corporate tax receipts offset by higher income tax receipts and lower benefits), Osborne has also made it harder for the Tories to oppose a more radical offer from Labour. Many on the left would like Miliband to respond by pledging to introduce a universal living wage, which would see the minimum wage rise from £6.31 to £7.65 in the UK and £8.80 in London. But with respected forecasters such as NIESR estimating that such a move would reduce labour demand  by 160,000 jobs, the equivalent of a 0.5% rise in unemployment, this remains unlikely (although a poll  last year found that 60% support a universal living wage even if it costs jobs).
It's worth remembering, however, that Labour has already gone further than any of the other main parties by suggesting that it should become compulsory for all public sector contractors and government departments to pay the living wage and by promising tax incentives  for private sector employers to do so. When Miliband announced his plan last November, the Tories responded by claiming, with no accompanying evidence, that the policy was "unworkable" and would have "a substantial extra cost to the Exchequer". But after Osborne's embrace of higher wages, such stock lines will be less convincing than ever. If Labour outlines a plan that is both credible and radical, and that the Tories, for ideological reasons, are unable to support, the Chancellor may well regret playing on Miliband's pitch.