It's a regional issue. Work is needed where it is, mostly due to the development of sea trade since barges were once the most efficient way to transport a huge mass of goods, pretty sure it still is. And we've developed an idea that some work is more valuable than other types of work. There is surely work that everyone could do, and work that only certain people can do, but we still need all of these people. I just hope that in the future some basic pattern recognition is used in the distribution of funds among humanity.