"Evidence-based policy" is a cant phrase that has been around for a while. I first heard it used -- repeatedly -- at Justin Trudeau's coronation in Montreal in 2012. It was clearly a term that was intended to set the Liberals off from the Conservatives, who governed in the teeth of evidence, facts, logic and science.
But once in power, this fresh new approach to governance was not to be. Climate change? Here are a couple more pipelines. And mind your manners, Injuns—we've got police and the military to sort you out if need be, and you've seen that movie before.