Twelve officers - The business of these twelve officers was to provide daily, each for a month, those provisions which were consumed in the king's household; see 1 Kings 4:22, 1 Kings 4:23. And the task for such a daily provision was not an easy one.
The requirement of a portion of their produce from subjects, in addition to money payments, is a common practice of Oriental monarchs. It obtained in ancient, and it still obtains in modern, Persia.