What are facts about confederation?

Orginally the pro was to defend against American aggression. Since Canada, once with the 7th largest military in the world, has intergrated it's military and now it's border services with America resulting in no effective defense against aggression the pro's of Confedration have changed.

In the 21st century a more common question in the West but also the East has become, why remain in a Confederation that takes more money than it gives in services, does not defend the land, and has build in inequities ensuring that some votes are more powerful than others.