I may be going astray, but I can see a way to degenerate "taxes paid" to "taxes before deductions" to "income since it relates to taxes anyways"
- 1% tax of 10 million = 100k
- 20% tax of 100k = 20k
Hence, the rich pays more tax.
If there was an unequal vote, I am pretty sure rich people would want votes as heavy as possible.