That is one of the reasons I chose to use percentage of income paid in taxes rather than income. We are told constantly how the wealthy only pay 14% in taxes and the rest of us pay much more. This would discourage that sort of maneuvering to some degree or give the middle class more influence.
I want to use percent paid in taxes on your TOTAL income not your taxable income. So Mitt Romney might get 14 votes but someone single guy earns a paltry 80K or something might very well end up with 20.