Mahon might favor corporations, but he is very much a socialist in convictions, as seen from both his in-game quotes and his galnet appearances. (
1)(
2)
The fortification ethos only shows what they work best with, not what they promote. Hudson, as president of the Federation, makes sure that Corporations have the power much more than anyone else. But he just has that extra bit of love for Patronages. He works better when it comes to greasing some palms.
Not to mention that they current implementations of the ethos are beyond ridiculous anyway, since they are locked to the type, not the character.
Finance favors Corporates.
Combat favors Patronages and Feudal.
Social favors Communists, Co-ops and Confederacies.
Covert favors Feudal, Dictatorships, Communists and Co-ops.
REGARDLESS of who has those ethos.
Does Delaine look like someone who would do well negotiating with Confederacies or Commies?
A communist state would have a revolt before power gets transferred through blood heritage*. But here comes Aisling and says otherwise.
The only one whose ethos actually fits their lore would be Pranav Antal. Feudal, Dictatorships, Communists and Co-ops are the ones who would be susceptible to a cult of personality.
So pay more attention to what they've done than what mechanics they have been given. Because the mechanics were a bit lazy.
*Unless turned to a dictatorship North Korea style.