It is four years this month since Guido began recording the misery of the nation. One of this government’s crowning achievements must surely be the decline in unhappiness among the population on their watch. Only the continuing deficit is preventing the index declining further. A joyous couple of months – a fall in both RPI inflation to 2.3% and unemployment to 6% – mean we are in one of the happiest periods we have been since records began. Osborne’s Long Term Melancholic Plan is working…