That was the recent criticism: https://www.cbc.ca/news/canada/shopify-ceo-endorses-idea-to-...
But i would go not for absolute amount of tax paid, but for relative tax paid with some floors and ceilings. pay effective rate of 30% (or less) income, get one vote. Pay 50% or less, get two, pay above 50% get three.
Pay less than 10% - no vote for you !!!