The Elite Systems was formed a few months after the events of the Arian Conflict as a reactionary procaution. Their main purpose was the constant pursuit of any Arian-related activity, and dealing with it in a militaristic fashion. As such, they're given the authority to operate outside of the Earth Union and its military's supervision. However, because of this, their job evolved from handling all Arian activity to handling all space activity, practically treating those who live in the colonies like dirt compared to those from Earth. This evolving development of their infamous dictator-like behavior would lead into the Cupio Event and the Elite Conflict.
