In a side-story of the LN, it's explained that the Guildmaster didn't have any bad intentions with Benno and his family store. The guildmaster is just kinda clumsy with emotions, and wanted to save the Gilberta company considering it seemed like it would have gone under without Benno's dad. But with Mark's help, they end up keeping everything running, despite loosing a ton of connections after his dad's death.