Perhapse we could run our own mock credit system over tribe or another program. All you would need for everyone would be user names and passwords, and someone to run the transactions.

Well the obvious reason is that a sick billionaire intent on setting a bunch of people on killing each other! Rewards for kills are a basic way to earn money, but reports with style and entertainment that tickle your billionaire fancy would be worth a higher bounty. The only issue would be that services/weapons available for the "money" are useful enough that people don't horde cash and upset the economy. This brings up a question I have regarding body guards and self defense. If someone were to make an attempt on my life, and miss, and then I should happen to return fire and hit them, what are the rules surrounding this sort of encounter? Do they get incapacitated and are able to make another attempt on another day? Are they eliminated? The first option sounds more fun, but might drag the game out longer.