A democratic system of rules doesn't mean a democratic distribution of power. Rules rarely have their intended effect 100%.
In all democracies, elites form, which wield far more political power, and derive far more benefit from government, than voters.
Even in a perfectly democratic society, giving the majority, acting collectively through their government, so much power over individuals would be dangerous, because it would create enormous rent-seeking opportunities for those who wield the most influence over public opinion and because it would endanger persecuted minorities.