For a number of reasons, but chiefly because of fear of corruption and decreased representation within the government. The Core worlds have been seen as receiving the best benefits and preferential treatment in all considerations, and Mid and Outer Rim worlds have been largely ignored in matters decided by the Senate. It's something I saw myself when I was queen and the Senate refused to take action when our system was invaded.

[ She looks down at her drink, wondering the thousandth time how it had come to this. How these problems were still happening after all the work she'd done since her appointment. ]