MarketWatch: Yes, Pope Francis may call Bill Gates, get Gates to bring together his friends, the 67 billionaires who are as rich as half the world, the poorest 3.5 billion. Or Gates may make the call. Doesnt matter who puts the ball in action. Pope Francis needs help in his mission to save the global economy from the rapidly accelerating triple threat of climate change, hunger and inequality. Fortunately Gates has a track record here: Back in 2009 he called billionaires Buffett, Rockefeller, Soros, Bloomberg,...