Maybe I'm missing the point ... but here goes:
It is relatively cheap to produce a reproduction of any painting that is so good it takes an expert with a microscope quite a while to decide it's not the real thing.
Why then should anyone be less interested in visiting a gallery full of top quality reproductions than in visiting a gallery full of originals? Especially if the difference is that by selling the originals off we generate hundreds of millions of pounds?
If you truly wouldn't pay to visit a gallery of reproductions that you couldn't distinguish from the originals ... what then are you paying for? Is it membership of some elitist club? Some sort of lifestyle statement? Forgive me, but isn't art about the picture? If the picture can be copied... the art doesn't go away?
Mark