I don't think the blockchain provides any value at all because you cannot verify if a transaction is valid without having a list of authorized voter... And that

I don't think the blockchain provides any value at all because you cannot verify if a transaction is valid without having a list of authorized voter... And that can only be the Gvt. If you have already a list of public keys for each voter why do you even need a blockchain to verify anything? You just through the list of signed votes to ensure uniquness, and you can confirm you personal vote is genuine but that is all you can do.