Why would mining companies bother investing tens of millions of dollars in exploration, production and jobs, over years and in some cases decades, on the chance that they may make a 6 percent return. Would it not be easier just to raise capital and then deposit it at the bank for a risk free rate of return? So it would be good to see some real examples from Mr Swan for both small and large companies on how this proposed tax will impact the mining sector and the economy at large, so that we can all make an informed decision on its merits.