The Tories can’t attack Labour without undercutting their own arguments
One thing that was noticeably absent yesterday was Tory crowing about Labour having signed up to the coalition’s current spending plans. Instead, George Osborne’s response to Balls concentrated on whether Labour would borrow more. Given the Osborne-Balls relationship, you might have thought that the Chancellor would have relished the idea that Balls had been forced into an intellectual surrender. But the Tory leadership is acutely aware that going on about Labour having accepted their spending limits undercuts their argument that it is the same old Labour party, addicted to spending and borrowing. So instead they’ve chosen to argue that Labour’s pledges of fiscal rectitude simply aren’t credible.