There are various other things to consider here as well. I am sure that the member you mentioned, must be making quality posts. But, if you analyze the complete forum, you will find very less number of members with such good writing skills. It does not necessarily mean that they are less knowledgeable.

Another thing I a see here is once a member gets merit from a member. Chances of getting merits from other members from same post also increases. This makes it more difficult for others.