Poorly educated natives resist taking low-paying jobs at the bottom of the
occupational hierarchy, creating a strong demand for immigrants. Meanwhile,
well-educated natives and skilled foreigners dominate the lucrative jobs at the
upper tier of the occupational distribution, and the concentration of wealth
among them helps to fuel the demand for the type of services immigrants are
most willing to meet. Native workers with modest educations cling to jobs in the
declining middle, migrate out of global cities, or rely on social insurance
programs for support.