We know that every year, one of the world organizations will publish a report about the country's Gross domestic product and a category of economic wealth levels. According to several scholars, they believe that when a country is already wealthy, every extra increase in economic riches does not make its residents any more satisfied because there are a lot of different types of people. However, we also should consider a country's development, which will be beneficial with additional growth in economic wealth. Regarding those issues, I will discuss them in this essay.