George Osborne's idea of a fuel duty stabiliser is attracting attacks because it is fundamentally a good idea. It also demonstrates the Tories understand the damage fuel price rises are doing both to the economy and to family budgets. In other words, Osborne is saying: "I feel your pain". Osborne has opened the plan up to consultation and has made clear it is not yet a pledge. The important point is that the Shadow Chancellor he has signalled he wants to do something on fuel duty, which the man in the street will appreciate. Vince Cable has something of a point when he says the idea is somewhat dependent on predictions of future oil prices, I suspect, but that doesn't mean the idea is flawed.
Labour has so far done nothing at all on fuel duty, beyond hinting that it will shelve the 2p rise in October. Big deal.