It makes sense: if you're good at your job, you'll be promoted. If you're not good at your job, you won't. People are rarely demoted, regardless of their job performance. This means that an employee will continue to be promoted until they reach a position for which they're unfit. Because they do poorly in that position, they aren't promoted to a higher one, and they're stuck being incompetent at their job.
This principle may sound tongue-in-cheek, but it has sinister implications in the real world. From transit delays and internet outages to oil spills and rocket explosions, how many of the world's errors come down to people rising to the level of their incompetence? Explore just how widespread this issue is with the videos below.