Two of my previous posts have advocated local authorities get authority from Government to issue a new currency which decays like ordinary goods decay. It would exist alongside the national currency. Because it decays, it will circulate much faster than the national currency, the rate being dependant on the rate of decay.
The previous idea was to do what the Mayor of Wōrgl, Austria did during the Great Depression in 1932, to spend it into existence by paying part of the wages of council employees in that currency. In the case of Wōrgl that was a Work Certificate that had to be stamped every month. Owners of the certificates would have to buy a stamp every month worth 1% of the note’s face value. That means over 12% a year of decay, or a -12% interest rate. Well that turned out to be big because the certificates circulated so fast that the town had to withdraw a large percentage of the notes from circulation.