As far as I see rich countries and poor countries have many examples and their influence, internally and externally tied to each other, the natural rich countries in terms of leading the country, including 80% of the country's employees love the country so as not to do corruption, from outside countries inter-cooperative relations the country is so good that it builds trust and equals "profitable,
the impoverishment of many impoverished nations has many factors, there is no desire to maintain the integrity of the state or citizens so that politicians or leaders often do self-benefit instead of the public interest, and many others