As soon as someone can prove that neither 90%, 75% or 51% of all NXT assets is hold by a group of say 10 people or less, I'll second this.
Problem is - you can't...
I still don't get why anyone would want voting based on number of NXT you have.
It has been repeatedly said that voting based on number of NXT would be a democracy approach. It is not. It is severe capitalism.
Imagine that your government would be voted based on the assets you hold in your bank account.
I kindly suggest you to pls advise a better approach to this problem.
We are open to practical solutions....as Nxt is an anonymous decentralized system...it would be very hard indeed to prove any accounts identity.