This sort of application might be useful in decentralized clan affiliations (or “Burb Claves” as in the book Snowcrash or other decentralized “national” affiliations, as in The Diamond Age both books by Neal Stevenson–I’ve been thinking of these a lot lately).
Friendly societies used to be able to provide health care, etc., very effectively and cheaply amongst the poor, but such arrangements were basically made illegal due to medical lobbying of the guys with the guns.
I like the idea of just taking those functions back, gun-toteing government like it or no.