The Problems with the Merit System
The merit system is flawed in my opinion, not enough people are willing to give out merits because if they do then they lost some of their own merits. Which leads to only a small amount of people managing to increase their rank on the forum, there is no clear guideline on how to earn merits and the supply of merits is unclear. Therefore it doesn't increase meaningful discussion or give recognition to any good content.
I do concur with you about the people conserving their smerits. I think we maybe need to calm down in our standards and see the global user, meaning: if the guy has a pretty decent post history, if you can see that he/she is trying hard, well, this one should be able to earn merits. But let be honest here. Most of the people don`t get the point, they prefer to quote whatever massive thread they found with nonsense lines which help in nothing to the poster or that have been already said many many times in the same thread. I think you need to understand that, quoting in mega threads is not giving you any chance of earning merits, for those threads are not even read, the people use to just take a look at the title and then run into an answer, without reading the full thread, without adding anything.
Just try to avoid these ones, and to engage conversations that are actually being interesting. I guess you are from China, many of us are interested in the Chinesse political-social circumstance so, for instance, you can write about that in the Politics and Society board and see what happens. Besides, think about your own skills, and how can you become an important part of the forum here, what kind of information do you have that, and how to spread this.
Now, regarding the Karma system, it is impossible to implement in here. This is a very competitive place, and given the number of users coming here just to earn something, well, merits are needed to stop the spammers in their ranking path. Notice that being a spammer is just to post garbage, to do infinite reply to megathreads, et al. Just try to understand the forum spirit and you should be able of doing it nice, and, probably, you will get why the merit system actually matters.
Just change a little your mindset, man.