Re: Nothing to do with democracy
You got the title right, our current system has *nothing* to do with democracy! As you say: "you delegated to them the authority to vote on your behalf. Only problem is that they rarely do..."
MPs are supposed to *represent* the views of their constituents in Parliament, unfortunately what most of them tend to do is represent the views of their Party Leaders and Whips to their constituents and basically say "that's how it is, like it or lump it".
Cameron and his ilk are currently campaigning on an effective slogan of "Vote for us, because we're not them" and telling people that voting for anyone else is a vote for another 5 years of Gordon Brown which sounds like desperation coupled with a lack of anything that makes them actually worth electing.
IMO the only hope we have of getting any representation back into our electoral process is to tactically vote for a Hung Parliament so one party doesn't have a "majority" (even when they only got a minority of the vote) giving the ability to force through whatever legislation they like.