There's issues to solve with #blockchain before this can become a reality.

Assuming 200M voters, voting on the same day:

1. Throughput scale, at LEAST 3k votes per second to be recorded.
2. Storage scale, signatures don't compress too well & batching is compute expensive
... https://twitter.com/Cointelegraph/status/1343761189193601025

3. Rollbacks & re-orgs. Probabilistic safety guarantees aren't enough. If I can point hash power at the chain & reorg/omit votes & change the election result (or void it!)

4. Sovereign identities & self management. Central databases defeats the purpose of using a #blockchain

5. Voter fraud could still happen. My spouse may have died, but I have access to their identity "just in-case" (spouses share this stuff). I could vote with that, or sell it.

Death oracles would then be needed, how? central database? that could censor votes of the living.

I could go on and on, but they are the main 5