Even if the Marquis Rückner household held the position of Finance Minister as heritage, I wasn’t going to risk such foolery as making an enemy out of the Breithilde margraviate household that managed the entire southern part of the kingdom.
Moreover I am the biological little brother of Erich-nii-san who is a vassal himself.
That is already more than sufficient as connecting relationship. Any more than that might very likely be considered to be greedy as well.