I'd support a world government if I was the supreme ruler. Imagine for a moment me as Supreme Ruler over the world. Poverty would be eliminated in 20 years. Every person on this planet will be well armed and well supplied with ammunition. Prosperity for all. Crime will be almost nonexistant. Daily public executions on the State Broadcasting Network (it will also be the only programming aired by the government).
Ah, that would be a wonderful wonderful world.
How exactly do you plan on eliminating poverty?