Excellent video Mike, but there is one thing that you might be able to improve on your identity+rock=realestate_owner analogy. You said that no society would ever do this, but once upon a time, the British had a system of sovernign gold debt using sticks. What they would do is when the king/government desired to borrow gold (usually to fight a war) he would
require that goldmongers (early bankers) exchange the gold for a stick that has been etched on both ends with the debt amount, and then broken in half. The treasury kept the long end, and the "lender" kept the short end as the record of the "exchange". Theoretically, anyone who had the short end of the stick could come to the treasury in London after the repay date and claim the gold in deposit by matching up the broken ends of the stick. In practice, the king just declared ursury illegal and ordered the treasury sticks burned.
But a society would, indeed, do something like this.
EDIT: BTW, that is where we get the term, "left holding the short end of the stick".
EDIT: Any gold bug worth his salt, and particularly Ron Paul himself, should know this history, BTW.