So the question is basically "How fast does credit decay?" Let's switch from goods to services and favors. Let's suppose you're in a real bind one day, and ne

So the question is basically "How fast does credit decay?" Let's switch from goods to services and favors. Let's suppose you're in a real bind one day, and need some help -- painting your house, moving cross-country, who knows -- and I step up and help you as a favor, and spend a solid week of my time. How long do I have to redeem that favor and get a week's worth of time out of you? How does the intervening time affect the answer? If I disappear for twenty years and show up on your doorstep expecting the favor to be repaid in full, is that a reasonable expectation? What if we are close friends for those twenty years, trading favors back and forth? There aren't necessarily right or wrong answers to those questions, but that's basically the question inflation answers -- it's the price for not participating. You do a job, you get your currency, and then you can roll your currency into participating in the shared risk for maintaining our systems of production, or you can stand back, and see the credit for your past contributions decay over time. Sometimes it decays slowly, when everything is going fine. Sometimes it decays quickly; if things begin going badly and you're not invested in the outcomes improving, your credit for your past contributions declines faster.