Most people are a boss at one time or another and don't even know it -- and the person people usually think of as the boss, isn't.
When someone works a 9 to 5 job, and they are not 'the boss' -- when 5pm comes, they can generally forget about their job and rest easy. The 'boss' however, still needs to worry about whether his company's orders are being filled on time, whether his immediate competition is outpacing his company, and so forth. At 5pm the office may close, but the worries remain. In that sense, the 'boss' is not truly the boss - his company's customer base is the true boss.
The ultimate top feeder in the boss / employee chain, is the person sitting back in their easy chair, and handing the waiter $20 to bring them a drink. That person, is temporarily, the boss.