I think the weight of your vote should come from the amount of taxes you pay, up to some cap. Can someone explain to me like I’m 12 why this is a bad idea?
Beyond anything else, intentionally designing a political system around disenfranchising a class of people seems like a bad idea from a human rights standpoint. You're creating a system in which the wealthier citizens can systematically take the rights away from the poor. I think you know how that can go wrong considering you're asking this question specifically on this post out of all posts.
All extant and historical systems explicitly disenfranchise some people, children, criminals, foreigners, etc.