You are ignoring the cost of the extra bank holiday, which cost the economy more than the wedding created by a large margin.We've already established that they have negligible political power, and what power is headship of the church anyway?
Can you prove that William and Harry don't deserve the ranks that they have attained?
At their what, sorry? Besides, the security cost pales in comparison to the revenue they generate.
Can we get away from this one example of the system failing and talk sensibly? You read like a Sun column. And someone has to represent the nation - why not the royals?
Ditto.
You are also selectively ignoring the negatives.
Cognitive dissonance is a terrible thing.
I just don't see it as necessary these days... but as discussed, good figurehead, good for tourism, etc... not really a good role model as not one single non royal can ever compare their life/growing up/experiences to theirs in any way shape or form - it's way too disproportionate. However, it's good to see that people jsut accept the status quo - I on the other hand don't 
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of course they couldnt because as i said they do not own the island unless they do by some sort of weird law.