I'm a dual eu-canadian citizen and I don't want Canada to join because it would shrink the range of policy options available to Canada. Avi Lewis' whole political program is basically illegal within the EU rules on state aid. Even Trudeau's fiscal policies to increase the debt would have been afoul of the stability and growth pact. Basically currently to get democratic socialist policies in Canada we just have to beat the liberals and conservatives, a tall order on its own and a incredibly hard task. Within the EU, we go from incredibly hard to nearly impossible.

So, tighter integration, yes. More cooperation with the EU absolutely. But membership is a bridge too far.