Aristotle’s The Middling Sort
From the paper:
The poor, conversely, cannot be good rulers because their attributes usually consist of being overly indigent, weak, or lacking in honor. These qualities make it difficult for the poor to follow reason, and they usually become malicious and base in petty ways. If the malicious were given the entitlement to rule, it seems that their hateful and wicked ways would cause a tyrannical, or master/slave society.
Only $13.90 / page
As was said before, the poor are full of envy for the rich and could, perhaps, attempt to revenge on those they resent. Either the rich or the poor can commit Acts of injustice. Whether it is through arrogance or malice, both are groups likely to act against the best interest of the city. The middling class must rule because both the rich and the poor, if given the claim to rule, are likely to cause nothing but injury to the cities.