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Comment by vannevar | Hacker News Reader

In that case Fred could simply pay her back the $500 and she would value it at $600 (ie, deflation). He has to pay her back $100 more in real value than he borrowed, so sometime between t and t+1, someone in the system must produce $100 in new wealth.

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I don't see the problem. Fred can sell his time/labor to make up the difference. If that is not possible for some reason, Fred could also default on the debt. Then the lender takes what she can get and learns not to make loans that cannot be repaid.

Fred can sell his time/labor to make up the difference.

In other words, Fred can bring new wealth into the system, yes. If he defaults, then Ginger learns that a key assumption of her loan---that the wealth of the Fred/Ginger system would increase at time t+1---was wrong. Which is exactly my point: that our system of finance relies on the implicit assumption that the economy will grow.

Fred can create new wealth simply by dancing to Ginger's tune for an agreed period of time. There is no limit on the amount of "wealth" that can be created; as long as there are economic actors in the system, their action is wealth generating if it is done in exchange for money.

See my answer to mrep above. There's no net increase in wealth there, Fred and Ginger merely shuffle money back and forth. And some of finance is exactly that. But some portion is not (ie Ginger loans out $1000, leaving her nothing to pay Fred with, and he has no interest in her services); that fraction of outstanding debt must be paid with new wealth, created in the interim. Ginger's loan is predicated on that possibility.

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