To explain how Millennials were really affected by the Great Recession, I need to tell you about a bank of windows on the southeast corner of 50th St. and 7th Ave. in Midtown Manhattan. I’d walk under it every day on my way to work in the Time & Life Building during the 2000s. And every day, there they’d be—a long line of twenty-something finance boys in starched Wall Street blues perched on the windowsill for their morning meeting...