I'm guessing this wasn't implemented due to longer code that the person who sent it would need to be refunded etc. But, I don't see why this should get overlooked. If a post that has been merited no longer exists on the board then the merit shouldn't be given neither.
Also, as members are raising voice against this problem, more abusers will get to know about this. They will also try to get away with their merit abuses by doing the same thing till a fix is implemented. Is there any page to see recently deleted posts here ?
Only by staff members:
https://bitcointalk.org/modlog.phpAlthough, this post and others that are being abused are likely to be deleted by the user and there's no page to my knowledge that shows this.