If you knew my solution, you would know that is false. There are not an unbounded number of people in the world. Remember I said it is unprofitable, so no one has an incentive to invest more. My solution is essentially one person one vote, but not in the way you would normally assume.
Surely I have given enough hints, you can deduce now what I have in mind. Any further incorrect assumptions, will not be corrected.
How would you identify a person? How to distinguish it from a computer or other virtual entity? IIRC there were some kind of coins that implemented proof of identity based on face recognition and web of trust. Never heard where it went so it must be safe to assume that they failed.