The mid-life crisis is just those times when you're not so into the things you were when you were younger.
When you're a carpenter making a beautiful chest of drawers, you're not going to use a piece of plywood on the back, even though it faces the wall and nobody will ever see it. You'll know it's there, so you're going to use a beautiful piece of wood on the back.
Billions of taxpayers' money has been wasted in bad deals. The London Underground modernisation, personally negotiated by one of Gordon Brown's team, was a disaster, as the National Audit Office has confirmed.

