Matthew Stewart is a philosophy PhD and author. He’s also a Princeton guy and former management consultant so he knows rich people. His new book, The 9.9%, is about them. Not the super-rich, but the doctors, lawyers and managers that go to good colleges and live in nice neighbourhoods. The “nearly rich and not-famous,” as he puts it. We talk about how these people raise their kids, get their money and block the poorer element from their neighbourhoods. Matthew reckons the 9.9% are a...