The following ideas may seem simplistic or like simplistic restatements of complex issues argued frequently in the area of politics and political philosophy, but consider them anyway.
1) Let's suppose our country finds itself in the midst of a great crisis, or has become aware of some great catastrophe looming on the horizon. Politicians and populace alike recognize its present or impending nature, as well as its seriousness, but cannot agree on how to combat it. The politicians of the country mostly agree on a piece of policy or law that will make life difficult in the short-term, but result in completely evading the impending doom. The populace however won't have it; they suggest a different piece of law or policy that may stave off the problem for a while or may even even present a logical solution to the problem when taken in isolation, but combined with other factors in the situation at hand, will be ruinous to the nation in the foreseeable future. When the people wills it, does the government reserve the right to say no? In asking this question I assume that disobeying the will of the people yields no significant immediate political consequences for the politicians involved, except that in the long term the people's belief in political efficacy declines.
2) I'm studying the Enlightenment right now in a political theory class, and we've been learning about how the development of scientific method fundamentally changed the way in which people asked and answered questions of the nature of man and the world. Francis Bacon basically invented science, by saying that answering questions should not merely involved sitting around and philosophizing and pondering; if you want to know how something works or if something works a certain way, you go into nature and find out: the answers to all the mysteries of the universe can be understood through observation. Since then, great strides have been made in fields from physical science to medicine to plain philosophy, because we have learned by observing, by experience. Of course humanity has been observing and learning governance since 10,000 B.C.E. at least if not longer; we have seen the patterns, how someone gets corrupted, how people get disenfranchised, what causes empires to rise and fall. We have observed and understood these phenomena to such an extent that there is a wealth of literature and a political science community, yet the only great stride we've been able to make in the science of governance is the creation of representative and social democracy. I wouldn't say that each of these has failed, but you'd think that with all the time we've spent closely watching the rise and fall of empires, with all the crooked bureaucracies, and with all the revolutions in all other areas of human knowledge (hell, even art), how is it that the science of governance has not had its scientific revolution? How is it that after around 10,000 years of the same patterns showing up in most if not all governance, all the same weaknesses of human nature, we have still not learned how to safeguard sovereign powers from the temptations of human nature? In fact, how do sovereigns, knowing the checkered past of their occupation, still not learn from that history?
3) And most basic question for last, what is the purpose of governance?