A few months ago, finding myself in Chicago with nothing to read, I picked up the book “Where Does the Money Go? Your Guided Tour to the Federal Budget Crisis” in a bookstore. I didn’t just pick it up; I bought it. And I read it. For a financial book, it’s light reading, with plenty of graphs and pictures, all geared toward getting regular people to think hard and intelligently about a major problem. The problem, of course, is that the U.S. is deeply in debt and digging itself deeper every year, thanks in large part to the decisions...