I think every major city has the wealthy suburbs nearby like that, industries grow and the wealthy owners leave the cities for more space. Bloomfield Hills is

I think every major city has the wealthy suburbs nearby like that, industries grow and the wealthy owners leave the cities for more space. Bloomfield Hills is ~20 miles away from Detroit. LA's rich and poor cities are much closer than that, and in NYC it's practically neighborhood by neighborhood with the absurdly wealthy cities farther out.