It looks like they are making good progress on fixing that corruption. Their efficiency increased by about 5% in the last two years. If I just plug in the numbers I get 32.24% and I got 26.88% two years ago, but if I assume their base income is 0.4 higher than accounted for two years ago (either due to more worlds counting as major or more trade partners than assumed) and that one of their three new cargo ships is needed for logistics I get exactly 25% two years ago and exactly 30% now. So Orion current base infrastructure income is 4.7. Assuming they keep the rate up they will break 50% efficiency within a decade, which would put them in company of the Risans, Laio and Tauni.