He doesn't want money or wealth. He wants power. Authority. He's ambitious, skilled, and charismatic. It is still entirely possible that he was behind the attempt on the Emperor's life, but even so, it doesn't change the above statement. If Patreus gets the throne, I guarantee you the Empire will expand. Greatly. We may even go from a cold war with the Federation to a full blown shooting war. He is a war hawk the likes of which we haven't seen in centuries.
But would that be something you would support - or do you just follow where the credits go anyways?
We live in an interesting time. The Federation is led by a president that the people despise following the disastrous war in Lugh and will remove from power at the soonest opportunity. The Alliance seems to be doing nothing except growing their local economies, though pirates rule their prosperous systems near Lave. The Empire's political strains are plain as day. Times like this have been when powers rise and fall rapidly in human history. The great World Wars of ancient days arose from such troubling times.