Unironically this used to be a "self-solving" problem because the high-income and low-income would self-segregate and deal with their own problems in their own

Unironically this used to be a "self-solving" problem because the high-income and low-income would self-segregate and deal with their own problems in their own areas. But modern liberal democracy kind of insists that those differences "don't really exist" and so we try to force everything together.