Sure, this is a good question. You'll note that few peoples actually choose to live in a dictatorship. Moreover recent history has shown that external countries (even with a UN mandate) throwing over dictators for the supposed benefits of the people rarely ends well for everyone. There's undeniably a conflict between the "right to interfere" and the sovereignty of nations. I am afraid we won't solve it here in a few Internet posts!

Countries don't have rights, they have powers, and derive those powers from keeping the governed from revolting. Natural law and so on is a justification for revolution, but realism is how things work.

It seems that in most countries few control most of the wealth, regardless of whether they're dictatorships or democracies.