So your theory is "the less a person has, the more motivated and productive they are". Surely some poverty striken nation like Somalia should be pinnacle of productivity?
Or do you need infrastructure and education, perhaps lets try Russia, mexico?
If that's still not good enough, what makes you believe thay the sweetspot of support is the US?
Or could an alternative, much simpler theory be true, that the country that's the world's money printing press and global center of capital has some kind of advantage?