Considering what he spent the money on, and the fact that he continues to disregard the opinions of the single most key person for national defense (In this case, the new saintess Mia), he doesn't really appear to be less stupid, just recklessly ambitious.
One thing I really like about this chapter, other than the BEEP BEEP BEEP BEEP BEEP, is that when Komugi pulls out the box, he addresses Nayu by her name, instead of the usual Master (which he used earlier in the chapter). It just adds that extra level of heartwarmingness.
You translated whatever Rai-nee calls Aix as "Master" which makes me believe it's either "Danna-sama" or "Goshujin-sama" in the original text. Both of which are terms for husband but also can be used by servants towards the master of the house. In this train of thought Rai-nee calling Luca...