Treasure comes in many forms. -- Knitnan
When the wealthy can afford room-sized vaults to protect themselves and their treasures, those who can't do so are bound to revolt. This is a fundamental truth. Civilisations end when the gap between the wealthiest and the rest are too large to be withstood.
When the wealthy live in secret, secure bunkers, separated from the real world by armies of their own guards and throngs of their own servants, you know the world is about to turn into shit. When the hordes of the starving pull down the walls with their bare hands, there's suddenly no wage large enough to protect the one who's been arguing towards paying you less.
This has already happened. With the bodies of the rich swaying from a convenient tree branch, and the bulk of the gore swept away, those who are left are picking through the remains. Paintings that haven't been seen by the common throng for decades are used as kindling to cook foodstuffs that have also not been seen by the common throng for decades. For a day or five, everyone here gets to eat like a king. A few even managed to walk away with inherently valuable objects, though the solid gold statue of the original homeowner had been melted down and turned into coins.