The bell curve explains why most people can't do difficult things. It does not explain why most of those who can do the difficult things end up working for someone else (rather than e.g. start a co-op). If stupidity was the entire answer, the smart bosses would be unable to find employees smart enough to work in their companies.
Some businesses only require simple work, so you could argue that they have one smart boss and many stupid employees. But there are many businesses that require highly qualified professionals. And those professionals have mostly been taught that their proper place in life is working for someone else. This is practically what school trains you to do for decades -- there is the teacher who gives commands, and the students who obey. And then you transition to a job where it is the boss who gives commands, and the employees who obey. I wonder whether a different kind of education would result in a different kind of a society.
Some businesses only require simple work, so you could argue that they have one smart boss and many stupid employees. But there are many businesses that require highly qualified professionals. And those professionals have mostly been taught that their proper place in life is working for someone else. This is practically what school trains you to do for decades -- there is the teacher who gives commands, and the students who obey. And then you transition to a job where it is the boss who gives commands, and the employees who obey. I wonder whether a different kind of education would result in a different kind of a society.