Explain why Plato thinks Philosophers should be Kings?

Plato's strategy in the Republic is to explicate the primary notion of societal or political justice and then parallel it to the concept of individual justice. Before he can prove that justice is a good thing, Plato must first state its definition, by showing justice in its perfect form in order to discover the true essence of it. Therefore, Socrates claims that the only way to have a perfect state is if the state has …

…justice is absolute. As the ultimate fate of Socrates demonstrates, being a philosopher is not a simple task. Generally, people are uncomfortable with trading their freedom for a world in which justice is absolute. Since the masses are not entitled to the education of the guardians, a desire to be rich, powerful or famous will prevail over the values of the philosopher. His ideals, no matter how noble, will almost always fall upon deaf ears.