Britain, Canada and Australia are not a political union in any other aspect than symbolism. Other than requesting the Queen to dissolve parliment, there is no union in those countries.
The EU passes laws that are forced onto member states, in order to have a federal system, you need a single currency.
Not to pick nits, Jake, but I'd accept this definition before I'd accept your "symbolism" remark. It's a Wiki thing and thus doesn't have the power of something rather official like a Constitution or something, but this works for me:
A Commonwealth realm is a sovereign state within the Commonwealth of Nations that has Elizabeth II as its monarch and head of state.[1] The sixteen current realms have a combined land area of 18.8 million km² (7.3 million mi², excluding Antarctic claims), and a population of 134 million;[2] all but about two million live in the six most populous states: the United Kingdom, Canada, Australia, Papua New Guinea, New Zealand, and Jamaica.
So Canada and Australia, along with the others, are "commonwealth realms", evidently. I think that goes a bit farther than "symbolism", don't you?
Just sayin'.
Lowly WikiYour point isn't lost, though. The EU does, in fact, drive the European continent (or tries to) and this, in combination with the Brits having a bit of a hard time with the euro replacing the pound, explains Farage's rather pointed accusations.