That's not a solution, that's another layer of abstraction to try to solve the problems of blockchain/decentralization for money with a new layer of issues.

Eg. The hashed list of emails. It's going to be a hard reality check if some of your "friends" don't have access to their emails anymore or just aren't friends anymore after x years. The amount he suggests is 7, which is insanely much. Even people have issues with their parents with money alone.

It's a nice fantasy though, but not workable in reality.