Rich countries are rich because of a successful culture. Nothing is stopping people from improving their own countries. Except many cultures do not show the respect to technology, industry, education and innovation needed to be successful.
This is part of the problem which the west in general (and the USA specifically) currently face.
The american PEOPLE no longer have respect towards capitalism, entrepreneurship, and industry. All three have become "evil" in their mind and must be destroyed. That is the root cause of the economic problems (the sub prime market, cap and trade, and the bailout are specific examples).
Things will only get worse without a change. We have a majority party that honestly represents the majority of citizens in its wish to destroy industry to save the planet (green delusions), destroy money because money is the root of all evil, destroy capitalism because capitalism is evil exploitative greed...