Why would I want 2 copies of the same book..?
It's a free market economy. Your suggestion is asinine. That's the nicest way I can put it. The "common collector" in playing cards doesn't buy Lotrek decks, just as the "common collector" in comics doesn't buy Golden Age first appearances. It's the way collecting works. There is a set supply and the smaller the supply the more it costs. With the ever-expanding number of collectors prices are only going to go up. There is no policing it. It won't happen.
You know what "policing" did for MtG? Wizards of the Coast created the Reserved List, never to print cards again, and prices continue to skyrocket. A little different, because they print the cards themselves, but "collecting police" would only serve collectors, and guess what collectors want? Valuable collectibles! It wouldn't work the way you think it would. Quite the opposite.