Because that's simply not true. A country is not its government. Look at literally any revolution in the entirety of human history and that's an obvious fact. The peoples, the cultures, the social norms that give a country the distinct feel that defines what it is survives beyond any given government.

The Canadian government works for, or at least is supposed to work for, Canada. It is not Canada in of itself. I'm so sorry that you feel so disenfranchised that you seem to believe otherwise, but we collectively decide what out country is. No elected official gets to decide it for us.