You don't want a national system to be truly decentralized because if it is, adversaries can simply co-opt and control it. If you have to look out for that and

You don't want a national system to be truly decentralized because if it is, adversaries can simply co-opt and control it. If you have to look out for that and roll off onto a different system (and have a mechanism to do so) then its by definition centralized and you can skip the whole blockchain chicanery. You can just throw up a tamper-evident log based system. [1] [1] https://transparency.dev https://transparency.dev