John Robson: Barriers to Trade Make Everyone Poorer

Commentary
People laugh at Yogi Berra’s “If you don’t know where you are going, you might wind up someplace else.” Then they do. Especially in government.
For instance, in horrified response to Donald Trump’s deliberate turn to trade protectionism, Canadian governments at every level have responded with… what’s this? Protectionism? Isn’t it the bad thing?
They say they think so. They say the world learned a lesson in the 1930s about how trade wars lead to the other kind, partly because “beggar thy neighbour” tariffs, quotas, and so on make everyone poorer. But if you ask why barriers to trade make everyone poorer, you’re lucky to get even a brief inaccurate response….