So what you're actually proposing is a blockchain where the mining process is based on e.g. UN member countries voting. Cool, but that's not proof of work, it's

So what you're actually proposing is a blockchain where the mining process is based on e.g. UN member countries voting. Cool, but that's not proof of work, it's not a cryptocurrency, and it's not very useful. They already have something a lot like this - it's called "Banks in the EEA".