The odd thing about the Conservative policy announcement today – where they pledged to match Labour’s public service spending over the next three years – is that the plans aren’t published yet and won’t be for a month or so. Talk about signing a blank cheque: if I were in the Treasury, I’d be tempted to put in a couple of joke commitments, just to annoy the Opposition. A gold statue of Kier Hardie, perhaps, or a really expensive metrication campaign. Right, Cameron, match that!