THE opening track of the Beatles’ 1966 album Revolver, George Harrison wrote the song not just out of self-interested anger at the supertax passed by Harold Wilson’s Labour government that year, but also because the money went to financing arms research and production.It is especially hard to pay taxes — even when far below the eye-watering 95 per dent rate faced by the high-earning Beatles — when bombs are falling. The levy had driven half of the Fab Four to the brink of bankruptcy.