This is both intended to explain to Mur how people feel about "favours" and to try to convince people not to feel that way. I feel qualified to explain the issue because I've felt the same jealousy, and I've mostly left it behind now.
Mur often gives "favours" to younger players who have involved themselves in the community, often vocally. In this, he is similar to a big business trying to fill a middle manager's position: As a big boss, you want the young, excited people who are full of energy and who will hopefully serve your company for years and years to come. Mur gets excited, thinking that this person could possibly change the face of MD permanently in a way that he couldn't himself, or that they'll solve a puzzle that he imbedded and probably forgot about. Generally what happens next is everybody else sees the "favour", gets angry, and pushes the person who received it to do less with it.
This is in no way directed at Seig nor is it intended to villainize him, as it's really a natural thing to feel this jealousy and most if not all players here feel it or have felt it, but it's misguided. Seig is simply what triggered my memories of the same feeling.
When somebody gets a "favour", most of the time it seems to have been easily gained. In Lone Wolf's case, for example, he did almost nothing but show up to the public meeting where it was decided that he would get a memory stone collector. This is the first trigger of the jealous feeling, the idea that "I could have had that". The second trigger is the lack of openness surrounding the "favours". In Fang's case for example, I don't know why he became MP7, and I never asked. This is because often the recipients of the "favours" lack social skill or are difficult to talk to (Lone Wolf, DD, Seig, Fang, dst, and even Mur himself, all similar in this aspect), and so people who aren't connected to them somehow or haven't spoken with them in the past probably won't ask about anything when they actually want to know.
TLDR:
If you want to know about something, just ask someone. If you want to get something, work toward it. Sorry for being an idealist.