300 hundred years ago, every country in the world was ruled by an absolute monarch, and that fact alone was considered persuasive explanation of divine will: the world must always be thus. Since then, the philosophy of rulers has changed, but small-minded apologists for the status quo have not evolved in their thinking. "If our current approach isn't the best option," say the small-minded apologists, "why isn't anyone doing anything different?" The answer to that question, in case it wasn't obvious, is the same as it was 300 years ago: entrenched interests.
Are you seriously arguing that it is impossible to allocate today's abundance of resources in a more fair and productive way than our current system does?