Yes you do, though suggesting it to an administrator on your favorite server doesn't hurt, I would like to point out though that there is a more advanced weapon rewards out there that is much more configurable.
http://forums.alliedmods.net/showthread.php?p=487651
The entire idea and "final concept" behind this is actually that of the cs stock market except with a better implementation, valve modifying the price of the weapon seemed liked a good idea...in the end it was terrible...but modifying the value of a kill based on a specific weapon...great idea
I do wish to eventually have it be dynamic like that of the csmarket...