In a recent burst of enthusiastic support for organized labor, Sen. Elizabeth Warren, D-Mass., hailed ongoing NAFTA renegotiation as a “wake up call” for America. It seems that Canadians are troubled by having to compete with lower-paid American workers, and they want to cartelize labor markets by way of a new NAFTA.

Most of NAFTA’s detractors mean well, but their argument is a perfect example of what can happen when two groups, one morality-based and one operating from self-interest, find themselves in alignment.