Personally, I have my doubts on the server's economy from my interactions with players and simply reading the chat but if anything messing with the voting rewards isn't needed tbh; magic meat is enough and despite the presence of elytra ( though unlikely since most of the server use credits for warps ) but the presence of magic meat is highly underrated tbh many times the help of magic meat has gotten me out of dire situations and potential deaths from the nether or shulkers. ( In a nutshell, I agree with what @Scrappy_Dont is saying. )
CM is arguably one of the most vanilly-vanilla server from my experince and only upgrading the reward benefit of the voting system simply for the purpose of retaining players seems silly to me as changing the vote rewards is arguably one of the quickest ways to further upset the economy.
Also, it's vanila! Work for it yourself!