All Scandinavian countries have billionaires. Sweden and Norway even have more billionaires per capita than the US. Scandinavian countries don't treat billionaires as policy failures. They merely have higher taxes across the board. In fact, the US tax system is actually more progressive because we don't have a VAT and much lower low and middle income tax brackets.

Moreover, the Scandinavian system locks in economic stratification much more than the American one

Hæ? How is that? Kind regards, bewildered Norwegian.