In the Nordic countries, they have relatively few children in the lower class (and even fewer in the extreme lower class). They also have relatively few children in the upper class. But they have big middle classes. Around 65 percent of children in those countries have incomes that are 150% to 300% of the poverty line, which is equivalent to 75% to 150% of the median income. In the US, on the other hand, there is a big lower class that is even larger than the middle class (so defined). And then there is also a relatively large group of children with incomes well above the US median, i.e. rich kids. While the Nordic distribution looks like a bell curve with the overwhelming majority of kids clustered near the middle, the American distribution is a pyramid. If you want to fix this bizarre distribution, the way forward is pretty simple.