RUE Britannia, Britannia rues the waves of disbelief, dismay and despondency that have been rippling across the nation since Alistair Darling’s Budget Day, when he declared class war on high earners and made ridiculously optimistic forecasts about economic recovery, while cheerfully ratcheting national debt up to £1.4 trillion by 2014. It’s time to quit. And if he won’t, maybe we should. It’s...