So 2/3 from those that are? It just means that those that are need to do more heavy lifting because there is at least a choice. Fair? No, but Earth doesn't care about what is fair and who does the most. It only cares about total output and so will the environment you live in.

My math is a bit rusty, but I'm pretty sure 1/3 is less than 1/2.

The people of China vote.

You are right that they don't have a democracy because the people are unable to truly organize without the powers that be at the top putting an end to any movements, but the people in the remaining 2/3s of the world never bother to take time to organize either, so the democracy they do have is really only a belief, something theoretical, and they if they ever decided to exercise it in the future may find out that they weren't actually under democracy after all.