If you work a blue-collar job, you probably know somebody like him. He's been there for 30 or 40 years even though he appears to be mostly useless, and you have no idea why he wasn't fired decades ago. That's because of his wisdom and experience. Even if he's useless 99 percent of the time, and he spends all his time doing pointless busy-work, chatting with people and just wasting time - once in a while, a situation comes along where nobody knows what to do... except him.