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Most Ponzi schemes have fatal flaws that eventually cause them to fail. Either they are exposed as frauds or at some point their growth tapers off and outlays exceed their income and they collapse. This scheme avoids both of these failure modes: it is impossible to disprove its key claim of reward after death, and so it cannot be shown to be a fraud. In addition, this major outlay never actually has to be made to participants (until they are dead), and so it will never run out of resources. At the same time as avoiding typical failure modes, this scheme can do what Ponzi schemes do best: leverage the income and effort of current participants to bring in new participants. I imagine this scheme could last thousands of years.