We are talking "bottom up" community based groups here, probably both geographical and functional. ie any group of individuals with a "common bond". But local groupds will be able to link together to form "pools of pools" and so on...
But local groupds will be able to link together to form "pools of pools" and so on...
Sounds like the credit union movement to me.... Index of Frank's Diaries
Existing credit unions would manage the process and the default "pool", and handle accounting and defaults etc as "service providers". "Any economic unit can emit money. The serious problem is to get it accepted" Hyman Minsky