On the Complementary Currency Skype channel we've got going, there was brief but old standard debate going on about fiat vs. mutual credit currencies.
I chimed in with:
When you expand your perspective about currency beyond only medium of exchange / monetary currencies the need for fiat currencies becomes clear.
For example, debiting a University for granting a college degree as reputation currency starts sounding awfully silly. There are quite valid reasons for fiat currencies.
However, if your goal is to create sustained monetary value, that form of issuance tends to be "bad tech." I think we might be able to transcend some of the dogmatic Mac/PC or Fiat/Mutual-Credit posturing if we consider these broader applications they create sharper contrasts and clearer hues so that we can learn which adjustments effect what outcomes.