Capitalism is, by its very nature, inefficient. It requires taking more than you give, which is called a "profit." That is great for those pocketing that profit, but destroys the overall system (i.e., the real world and the people in it). In order to make a profit, labor must be paid less than they produce, resources extracted without putting anything back, and costs (like pollution) externalized. That looks great on the balance sheet, but it is terrible for the world and all of us in it. Capitalism is literally killing us.