[W]e can produce more than enough food to feed everybody, and there is definitely enough work for everybody in the world, but there is clearly not enough money to pay for it all. The scarcity is in our national currencies. In fact, the job of central banks is to create and maintain that currency scarcity. The direct consequence is that we have to fight with each other in order to survive.
— Bernard Lietaer (former member of the European Central Bank, now professor of Economics and author of Rethinking Money)