With a few modifications I think it could actually result in something better than what we have - but not without sacrificing national and individual sovereignty, which is a non-starter.

It might work well for an advisory committee that has no authority whatsoever, but just can't trust the politicians who would be voted in by the people to stay in their lane and not seek additional, further power.

Additionally, allowing a vote in the first place, much less for a global heirarchical authority, even in the best of implementations, would still be assuming unassumables - such as that it would not be gamed, and that identities can be verified with respect to human rights using currently accepted technologies.

If it were possible (it's not) to count votes properly and allow only one per human and have the vote not be cheated, (again, not possible) I would add the idea that all people with zero or one votes are eliminated after the first round, and the second round everyone votes again, only among those that had received 2 or more in the round prior.