Praise be to Allah.
We put this question to Shaykh ‘Abd al-Rahmaan ibn Jibreen (may Allaah preserve him) and he answered as follows:
He should be given from the share of the person in charge of the waqf, because he is getting five percent whether he is the one who does that job or delegates it to someone else. If he delegates it to someone else, then that person is taking his place and should take some of his share.
And Allaah knows best.