Laws require a law giver, and enforcer. There is no such thing as natural laws. I agree with you democracy isn't great, its just mob rule. But I think you're conflating political and economic systems. The economic system suffers from the same failings no matter what the political system is. The problem with the idea of natural law is it assumes everyone is fundamentally good and wants the best for people. But as we know everyone is prone to greed, and there is no answer to the corruption that power brings. I firmly believe most, not all, politicians got into politics with good intentions to make the world better. But once in the temptation of power is too much for them and they forget why they're there. And of course power attracts the worst people too.