Your solution isn't as simple as you present it either. Disability isn't taxable, nor are military allowances. Are disabled workers and soldiers to receive half a vote under your system?

And I see you lumped in social security with welfare- you realize that's not a freebie; workers are required to pay into it their entire career. Are they supposed to only receive half a vote because they retired?

As to "gaming" my system: OK, if you serve a tour in the military, or go to college and get a job to get more votes, so what? It's an measure of your contributions to society, not you motivations. People that put in the effort get a greater say in government, why they put in the effort is a personal matter.