Sandbox working this

Savings groups and financial intermediation among the poor

Informal savings and borrowing institutions are a way to intermediate between savers and borrowers in the developing world. But if these associations attract mostly savers or mostly borrowers, or are concentrated in one occupation, they may not function as well as they should. 

Thus us really a credit rating problem, we trust folks in our own profession.  Hence, if we add restrictions on budget, via contract,  we can compute borrower risk.  Keep 15% liquid and you get cash in advance up to three times that. 

Also central banking in the small nation is subject to government shocks, the currency too volatile.  Problem, unsolved for the small nation. Citizens always at risk of government theft via the CB, or even direct theft.