By redefining immigration as a moral issue, elites have shut down debate over its costs. That’s helpful for them, since for the affluent, immigration has few costs and many upsides. Low-skilled immigrants don’t compete in upscale job markets. Not many recent arrivals from El Salvador are becoming lawyers or green energy lobbyists. An awful lot of them are becoming housekeepers. Mass immigration makes household help affordable. That’s one of the main reasons elites support it.

