Almost any system that limits participation in democracy will be abused to disenfranchise people that those in power do not want to give a voice. So you're com

Almost any system that limits participation in democracy will be abused to disenfranchise people that those in power do not want to give a voice. So you're coming at this from the wrong end. The goal is explicitly to keep the poors from having a voice in politics. The exact policy and enforcement of the system will reflect that. Unintended consequences, like the rich being disenfranchised would not occur.