If this society can actually pull off their homemade economic system, well, kudos. But we're betting heavily that the "Trapping 1,000 People in a Tiny Village with Nothing to Do But Pass Cocaine Around" Plan is eventually going to backfire in a pretty huge way.
Prisons can be pretty wacky places. Morgan Freeman might hang around and share his wisdom with you. Adam Sandler might ask you to join his football team. You may even get to play softball with George Bluth. Oh, and the sodomy. The violent, nightly, sodomy. (What'd we tell you? Wacky, right?)
Because of all that wackiness, drug screening is becoming more prominent in our nation's penitentiaries, in an effort to ensure all those non-consensual amorous shower rendezvous are at least done while clean and sober. The easiest way to screen for drugs is with a urine sample and, unfortunately, prison is not populated by an entirely honest group of folks.
As a result, clean urine has become a valuable commodity in prisons. Clean samples can be traded in condoms which are then stored in a really warm place to ensure they stay at body temperature. What warm place can you hide a condom full of pee that will keep it at body temperature? If you guessed in your anus, you're disgusting, but also correct.
If you're unfamiliar with the island of Yap, it's because it barely exists. If you took Disney World and put it out in the middle of the ocean, that would pretty much encompass the same land mass as Yap. Call it Micronesia and suddenly it's its own country, complete with a population of about 6,000 people.
The people of Yap had a curious tradition of using big ass stones as currency. How big ass? Big ass like 15 feet in diameter and weighing about 2 tons. In fact, the bigger the stone and the more difficult it was to move, the more it was worth, because as we all know, cumbersome shit is really worthwhile, just ask anyone who still has one of those giant half wooden TVs from the 70s or an 8-track player.
They would even sail canoes to other islands to bring back the giant stones with which they could purchase coconuts or wine coolers or whatever it is the people of a tiny island nation need to buy with 12 foot rocks.
The official currency of Yap became the US dollar a little while back, but the stones, nearly 7,000 of which are still all over the island, are used for traditional exchanges, as in marriages or land transfers and, presumably, to bowl downhill over your poorer enemies, who are forced to flee in terror and scatter paltry pebbles in their wake.