Aristotle's perspective is not ours. Modern political discussion is imbued with a concern for individual human rights; we look to institutions to hold accountable those who wield power over their fellows, so that the rights of individuals are respected. Aristotle does not. Because he sees the world in teleological terms, he asks—as Plato did—how we can ensure that the state functions as it should. The excellence of the citizenry and the excellence of the constitution are understood in that light. Hence, of course, Aristotle's focus on the collective intelligence and collective good sense of collectives; if the many are not to be trusted, it remains true that many heads are better than one.
On Politics: A History of Political Thought: From Herodotus to the Present (2012) - Ch. 3 : Aristotle: Politics Is Not Philosophy