My commune once explained to me how capitalism works and why it fails. A teacher decides that those who get the best grades get to take 10 points off the test of the kids who get the lowest grades. The kids who did well don’t try on the next test because they get free points from the kids who did bad on the last test. The kids who do bad try hard to get a better grade, but don’t because their points go to the kids ahead of them. Also the grades your parents got in school determines your first grade on the test. Eventually everyone kills the rich kids and the teacher.