Well, going back to my previous post, put it this way: as a nation under the commonwealth, and therefore with a constitutional monarchy, you are paying taxes to the Queen, who is the leader of the Church of England. I can tell you right now that this point alone would justify supporting the Republicanism movement, if I were still living in a commonwealth nation. My cousins and brother in Australia share the same feelings.
Despite what people have to say about the United States, we are unique in that we don't pay anything to any religious organizations as per the constitution (with the exception of their sickly tax-exempt status).