“Look you out therefore, brethren, from among you seven men of good report, full of the Spirit and of wisdom, whom we may appoint over this business.”
So they put forward the practical solution that seven suitably qualified people be selected from among their number to act as administrators, taking charge of the practical distribution of alms among the Hellenists while they themselves concentrated on preaching the word. (The system which was working well among the Hebraic believers could carry on as before). All that was necessary was that they be men of outstanding reputation, and full of wisdom in the power of the Holy Spirit.
It seemed a good and practical solution, and was quite probably decided on the basis of Jewish practise. It revealed their general naivety in that it demonstrated their limited vision. They had no idea when they did it what an avalanche they were unleashing. For God had other plans for the extending of His work, and this was the means by which He was bringing them about. He would not limit the seven to serving tables.