We love to hate the 800-pound gorilla. Walmart and Amazon destroy communities and small businesses. Facebook turns us into addicts while putting our personal data at risk. From skeptical politicians like Bernie Sanders who, at a 2016 presidential campaign rally said, "If a bank is too big to fail, it is too big to exist," to millennials, only 42 percent of whom support capitalism, belief in big business is at an all-time low. But are big companies...