There are more problems than just that. Who can be trusted to hold the wallets? The candidates holding it themselves would create a conflict of interest because they might pay someone to send dummy votes to their wallet. And there is all types of fraud that can be pulled if the wrong people are custodians for them, which pretty much includes all citizens who have a favorite party.

Then there’s the problem of the blockchain developers being the only ones capable of investigating cases of fraud in their own voting blockchain, while there are already procedures in traditional voting systems to alert governments of potential fraud.