From current election rules, the influencing power of each voter is the same and that causes a limited power on each ballot. Suppose there are 2 candidates, X and Y. Voter A prefers 1% more for candidates X to Y while voter B prefers candidates Y to X by 100%. Each of the candidates gets one ballot. The inconsistency of ballots and preference is the crucial problem happening.
To ensure consistency and representativeness, despite the tax paid, voters pay additionally X% of the tax paid to vote (X%)(100).
Feel free to comment, and I can give more information on it.