That's precisely my point; in democratic terms, the monarchy is wholly illegitimate; opinion polls sample a small proportion of the electorate, which is manifestly not a democratic election; if it were, we could run elections very cheaply by running focus groups in and around Westminster. Whether or not the monarchy is imposed is moot; that has never been tested in an election. No serious party has ever stood on an 'abolish the monarchy' platform ('Her Majesty's Loyal Opposition, for Pete's sake!), and therefore we don't actually know what the 'expressed will of the majority' is. We can guess; but we don't know. How much of the current monarchism dies with the current Queen? Individual MPs have been elected though; remember Willie Hamilton? As a member of the Disloyal Opposition, I will keep expressing my distaste for this feudal anachronism, and refusing to be the 'subject' of an unelected, illegitimate institution.
With reference to the cost; ever heard of the principle 'no taxation without representation'? I've never been offered the chance to vote yea or nay to the monarchy, so why should I be taxed to pay for it? If the vote occurred, and the majority said yes, then I go along with the democratic decision. No such vote has taken place, and the Establishment in this country will fight tooth and nail to make sure it never does. I'm with Oliver Cromwell on this one, I'm afraid; I wouldn't tug my forelock, even if I had one, and I don't defer to anyone simply as a function of an accident of birth.