Another route is to find a place where the cost of living is much lower for a comparable standard of living. According to my research, some more underdeveloped countries seem to be such the place:

http://news.ycombinator.com/item?id=122341

Of course you might say the cost of living won't always stay so low, but if it goes up, then that means the underdeveloped countries are becoming more productive, and the world economy is becoming better. If your interest comes from investments in the world economy, then that means you should be earning more from your investments.