1. democracy encourages equity, and discourages efficiency and hard working. just look at continental Europe for evidence of slow growth as a result of social welfare program.
2. popular vote, ie one person one vote, cannot lead to most efficient allocation of capital, as those who do not have capital and wealth are voting on how to spend capital/wealth from those who have. the natural inclination is to move money from your pocket to my pocket. democracy offers a legal way to do so.
3. the correct choice in longer term frequently is a painful and difficult choice in short term. Popuplar votes tend to support short-term band aid type solution and keep on kicking the can down the road.
4. the alternative and first best solution is to have a wise leader with total authority. however most of the time it leads to worse outcome over time. once the former great leader gets entrenched over time, he / she tends to do whatever it takes to keep the power within his / her family to build an empire / dynasty. Think in terms of Mao. Kim family does not even qualify as wise and elite.