As the intrinsic value of artifacts and pieces of history skyrocket, the desires of the families who own those objects is beginning to come under scrutiny. Already, the British are seeing the effects of leaving no suitable heirs, debts, and crumbling fortunes to go with crumbling homes. This is the decline of an empire without the necessary war to finish off the ancestral homes and turn out the cousins and the uncles who are too far removed to make a legitimate claim.
And that really is the difference here. In centuries past, the conquering armies would walk off with the loot. In Britain, that hasn't happened for so long that there are, literally, homes overflowing with aged, squalid pseudo-treasures and, to be certain, more than a few legitimate ones. Where are the Russian hordes, ready to carry back to Novosibirsk the great treasures of a minor lord or prince?
No government should be expected to step in and buy every little trinket or doodad saved for two hundred years as the expected birthright of someone who now has few prospects in modern British society beyond a pension or a respectable middle class salary. How can you expect a person making less than sixty thousand pounds per year to run and maintain the costs of a multi-million pound estate when everything is in debt or arrears?
Let them sell these things into the marketplace. The real history will come out and be preserved if the price is correct.