I'll agree to half of this. Geb certainly has finance and thinks the Prosperity Party are in his interests. They are pro-capitalism and the TPLF is a socialist and ethnic nationalist party. The West supported them during the previous civil war which was essentially a Cold War battle. It hasn't proven a wise move as the TPLF encouraged ethnic conflict which the communists never did but the West supported them because they were not aligned with the Soviet Union.
The problem with the PP is it wants a small centralized government and to sideline the regional assemblies. In a multi-ethnic nation, it won't work - you either need a big central government or a devolved confederal structure like Switzerland or Belgium. Other nations with communist or imperial governments have struggled to maintain their integrity - think how Yugoslavia descended into war, the nations were not able to form a functioning state. The TPLF at least recognized some of this and were opposed to a centralized Ethiopian government.
It's easy to forget the Cold War only ended 30 years ago and there are many of these countries that are still affected, long after the Western Bloc. If the PP are successful, whatever's left of Ethiopia (maybe just Oromia) will be a state for which Westerners can invest and do business with. It's a question of whether the marginalization of the smaller minorities and the ensuing bloodshed involved to bring that about will be worth it (probably not).