If a country is already rich, further economic development will not lead to its citizens being even happier
I agree. I think a developed country or underdeveloped country are different from each other. In the case of a developed country, because it has every infrastructure, if there are more jobs, then, its citizens's 'happiness exponent' can rise. People basically want the problem of necessities of their life to be solved. People believe that they're happy if they can get to have those things. In an underdeveloped country, because of the lack of infrastructure, its citizens' 'happiness exponent' is very low. The country must develop social infrastructure first. Through this, the country should create more jobs and improve the quality of its citizens' life. As technologies develop, the quality of life is being improved dramatically. Eventually, national happiness index can be higher only when people in a country can elect their excellent president. This suggests that they're partly responsible for their low happpiness exponent. Who should be blamed?