When billionaire Warren Buffett pledged to give away 85 per cent of his fortune in 2006, as part of a Giving Pledge where some of the country's wealthiest people would do more to help charity, he was applauded. But, seven years on, his son Peter warns that just throwing funds at problems in society such as poverty and ill health can prevent a more permanent solution from being found. In an opinion piece in the New York Times, the composer and chairman of the NoVo Foundation warned that a donor's desire to 'save the day' could have 'unintended consequences. Mr...