After the Great Recession, finance has a gotten bad rap as a professional calling: A survey last December found that nearly half of Americans think that the financial system hurts the economy. Even among readers of The Economist—where bankers presumably have home-field advantage—a poll found that 57 percent disagreed with the statement that “financial innovation boosts economic growth.” Luigi Zingales, a professor of finance at the University of Chicago’s Booth School of Business, has been studying the public’s post-recession loss of faith in the financial sector.