I disagree. The Chinese and many Central Americans will work hard for decades without really advancing. It is because the kids are spoiled and lack character. Lots of them get bored even playing sports after 30 minutes. Take away all media, give them work to do before school and after, as in the days of an agrarian economy. And keep them in church that preaches the Prot work ethic.
The big problem is no accountability. Supervisors don’t know how or are afraid to supervise.