This is such a shallow view of the world. No, if every single billionaire died tomorrow, literally nothing will change. The people below them will rise to the top. People who think like you also think that if they got rid of the hierarchy, then surely the problem will be solved… But no, when one hierarchy is gone another will take its place. This is because humans are social animals, and like all the other great apes, we evolved to exist in hierarchal societies.