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Problem isn't on merit system. Problem is on our mind. First change your mind. I don't know who wrote a quote, probably Adlof Hitler,
"If you dont like a rule, just follow it , reach on the top and change the rule. .
Something similar I want to say if system is annoying you just follow the system and try to gain top position. Than you will never complain.
On the other hand corruption is every where, even your government. So nothing new on forum also. If you find some one abusing merit system make a thread on Reputation board. DT will tag them. Merit system not moderated by forum.
Just avoid make complain and work hard to earn merit.