Here’s an interview that Donald Berwick, President Obama’s appointee charged with cutting $500 billion from Medicare, gave in October 2006: Effective leaders know their deficiencies. How do you address yours? I don’t feel like a leader, so it’s very hard for me to project myself into that situation. But inattention to detail is my biggest defect. I’m always leaning forward into something new. I can create a mess. Luckily, I have people who are willing to create the detail around the idea or, if they’re really smart, know which ideas to ignore. The second defect is more personal uncertainty than...