If you assume that decision makers operate entirely in silo from their constituents then yes, that's how this works. Howver if you are operating in the normal mode of democracy where decision makers consult impacted parties through town halls, solicited feedback, subcommittees, etc etc then there are ample opportunities to obtain high-quality, low-latency signals. "Voting with your money" is (IM personal O) a scapegoat for government leaders to avoid doing their due-diligence (not to mention the massive power imbalance that results from people with lots of money 'voting' way more than people with less money).