Answer:
The reason is that aside the gdp the human development index is calculated based on three factors namely
1. life expectancy
2. Education
3. per capita income
And these countries are doing perfectly well as compared to the USA based on the above
Step-by-step explanation:
What is the human development index (HDI)?
The Human Development Index (HDI) is a statistic composite index of life expectancy, education, and per capita income indicators, which are used to rank countries into four tiers of human development.
A country scores a higher HDI when the lifespan is higher, the education level is higher, and the gross national income GNI (PPP) per capita is higher.