Voting is how this mess started... how is voting harder going to fix what voting created? Nothing short of a common national ethos of trust in an almost unremovable leader can solve this problem. A leader who can listen to experts and make a choice, even if unpopular, without fear of next election and without the need to aggrandize more power and wealth.
"Fear of the next election" is one of the few things that keeps elected leaders in line.
You want a wise, just dictator for life, and maybe you luck out and get one who reigns beneficently for a few decades, but who's to say their successor will be as good, or the next one, and on and on until you inevitably get a Stalin.
Put another way: if the leader dies, and heir A spends all their effort on ruling effectively, and heir B spends all their effort on beating heir A to the throne, how can heir A succeed? You'd need metrics for being a good ruler which are immune to Goodhart's Law.
Given that—over time—power inevitably centralizes and inevitably is abused, those tendencies must be counterbalanced; or else power must be regularly reset by more crude means.