As for the reason, it was apparently due to the peculiar complicated circumstances of nobles.
During the sortie preparations in the garrison, Erich-nii-san visited claiming that the sortie of the Associate Baron Baumeister household’s armed forces was indispensable and begging to be allowed to provide the necessary funds for that.
Afterwards, given that Erich-nii-san was likewise participating holding both roles of being second-in-command in addition to being a staff officer, I was at ease entrusting him with a treasure of the degree of 100 platinum plates.
If it’s Erich-nii-san, he wouldn’t try something like pilfering the money he was given.