The other guys suck but we won't really do anything different isn't really a compelling election
narrative.
Mr Miliband has warned his party that its goal of social justice will have to be achieved by other means, that there will be no return to the "Blair-Brown era" of ever-higher public spending. Miliband allies dismiss the latest Labour grumbling, saying that in the long run one good joke by Mr Cameron will matter a lot less than the Prime Minister's flawed judgment on the economy and Europe.
A very familiar one, however.