CALIFORNIA GREENS SUPPORT LETS TIME-BASED CURRENCY
California Greens "Restructuring the Economy
http://petra.greens.org/california/pl98/economy.htm#pgfId=996904
Encourage the development of an informal economy, including
volunteerism.
The unemployed and underemployed could participate in the local
economy through a credit barter system.
In this system, the medium of exchange would be individual
credit-debit accounts.
People would extend credits and collect debits from one another
for the purchase of each other's goods and services. These
credits and debits could then be transferred among community
members, circulating much like a currency.
Since local members would redeem the currency with their goods
and services, this medium of exchange would have a local value.
Changes in banking regulations would be required to support such
a program.