I am not convinced you hit even close to the target here. I believe there are plenty of excellent examples to contradict your premise. The most prominent is the complaint of minority immigrants that their children don't get a fair shake. While they complain of language barriers, overt racism, lack of funding and other hurdles, the children of Asian immigrants continue to not only outstrip children from other minority groups, but often the byproduct of generations of American citizens.
The truth is all too many immigrants and minorities have come to the conclusion that our society owes them everything on a platter. And I think the children of US citizens fall into that trap as well all too often these days.
I witness too many immigrants scarfing off the fat of our land, both parents and children to buy into the honest work ethic you espoused here. And I would add that as regions sink into overcrowding and poverty, the numbers of all groups that abuse the system rises exponentially, not just minority or illegal immigrant groups. That's why I see the flooding of this nation by massive numbers of poor under-educated people to be so devistating. It's a seeding for planned failure, for community destruction, for national suicide.
Good example being the 10,000 Somali refugees we are importing. Probably as a feel good gesture to the congressional black caucus.
Somalis rarely work but get all kinds of enhanced and immediate government handouts since they are refugees. Why would any Somali in his right mind want to move to cold climate Maine where there are few jobs? Yet they do by the thousands once they get to the USA. Answer is the welfare money goes further there.