Britain must not keep changing prime ministers, Sir John Major has warned in a broadside at those who treat politics as a "game show" while leaving big problems to the next generation. The former Conservative prime minister accused today's focus-group obsessed politicians of thinking their job was to "provide fodder for the media and project your own career" while delaying action on complex issues like healthcare, pensions and climate change. In an interview for BBC Radio 5 Live and Newsnight,