John Lehman, a former Secretary of the Navy and investment banker, says that corporate chieftains don’t always transition well to government – noting that private sector experience isn’t always transferrable to the public sector. "It's so much more fun to run a company. You say, 'do something,' it gets done. You have the leverage of salary, of firing people," Lehman told Time in an interview. "A CEO takes a long time to adjust to government. They're used to a command situation."