I really like his idea that only merits for quality posts about the bitcoin since many people are sharing merits in the meta section.But I think he is a merit source since he is the most merit sender of our forum until so his job is to find the good quality posts,not to ask post a quality post in his thread.
He started the thread first and then was made a merit source because of it. He does also look around for things to merit other than people coming to him.
I think I agree with some of the other comments here, a lot of merit is given in Meta because that's where most of the conversation has been happening since the system was introduced. There quite a lot in the Bitcoin Development & Technical Discussion and Bitcoin Technical Support as well. I think Bitcoin Discussion is still mostly signature spammers that already have high-level accounts but you can find a bit more discussion going on there now. As TMAN just said give it a few months and I think you'll see a bigger improvement.