Because despite popular belief, market economies aren't as efficient as we think and they add bureaucracy even when it's not logical to do so. Useless jobs cov

Because despite popular belief, market economies aren't as efficient as we think and they add bureaucracy even when it's not logical to do so. Useless jobs covers this quite well. But the tldr is that assuming the market runs in logical is a flawed assumption and that the market adds inefficiencies on its own.