I found this sentene in an old Guardian.
"But Japan’s farmers not only enjoy prices for their rice about eight times higher than on the world market: their votes are worth two to three of every urban dweller’s because of the uneven population of constituencies."
I understand what the sentence wants to say but why is the verb "enjoy" used this way, why not "do not only enjoy". This part of the sentence doesn't seem to have a proper predicate. What is the purpose of this usage?
It's a kind of not only...but also sentence. It doesn't use the words but also, but that is the implication of the second benefit.