Philosopher Kings: Fit to Rule?

In the issue of philosophers making the best rulers, yes, I agree they have intellect but will a philosopher have the civic-mindedness to rule a group of people who think completely different from him? Their natures are, after all, “always in love with that learning which discloses to them something of the being that is always and does not wander about, driven by generation and decay” (485b). Socrates points out that philosophers have a soul dominated by reason and rational thinking. Their desires and appetite are quieted by the love for learning and pursuing the truth. This is all well and good but when the majority of the people he has rule over are knowledgeable in the civic realm, can true intellect or understanding carry him through? Socrates says that there are only a small number of true philosophers and that they make up the extreme minority. What is the guarantee then for these men be able to stay true, or as Socrates puts it, “What salvation do you see for a philosophic nature so that it will remain in its practice and reach its end” (494a)? Can he even relate to the problems that arise from a city of these thinkers if his own mind is only on the truth? Or will he be unable to relate to the people and even be able to resist the influence of majority. And as Socrates states, “Do you think it will be easy for him to hear through a wall of so many evils” (494d)?