By Matthew Lesh All parties are putting forward nice-sounding policies and promising that they’ll be paid for by someone else, says Matthew Lesh “Our plans are fully funded and fully costed,” proudly declares every party leader when presenting their election manifestos. It’s not difficult to understand why this is so important. Politicians are trying to run a gigantic government machine that spends over a trillion pounds each year. Being responsible with the nation’s finances is an obvious prerequisite. The perception that the plans are fiscally irresponsible can be electoral suicide. Jeremy C…