The U.S. segregates based on house prices.
To the degree that public schools may be funded by local property taxes, some may hold your view. However:
The method of school funding is almost irrelevant. I'm saying that many affluent parents want their children to attend school with other children predominantly of the same class, even if the per-student funding at the school is only average.
While the liberty of U.S. citizens is often enjoyed as pursuit of the American Dream of upward mobility, financial security, and a good education, there may be, as you suggest, an affluent minority which sees itself as a socially distinct caste; Some may say this is quite different than your earlier assertion that the U.S. segregates based on house prices.
Meanwhile many may see your statements as an attempt to hijack the thread and veer off-topic from Ability Grouping Research.
Enough ability grouping research exits to take note that it is not beyond the purview of public schools to offer flexible cluster grouping by ability, readiness, and pacing for advanced academic curriculum.
