Australia has a seriously big “nest egg”. The Future Fund – our sovereign wealth fund set up in 2006 – now manages about $230 billion. Specifically, its remit is to “invest for the benefit of future generations of Australians”. That’s long been interpreted as earning the best possible return on investment, without unacceptable risk. Along with a few other smaller public wealth funds, it’s managed independently, on behalf of the government. So the government ruffled feathers this week when it announced a new investment mandate which, for the first time, will require it to prioritise specific investments in Australia: increasing…