Every Church has a Leadership team. This may consist of at least one person who serves as pastor, staff and custodian. (I have been there in small Churches.) This is certainly efficient, but also limited to what one person can accomplish.

In most Churches, there are both Ministers and Lay people serving as the Leadership Team. This fits the model in ACTS, where there were Apostles for Spiritual Matters and Deacons for Materialistic Matters. It is a good blend, ensuring that the Church remains focused. And the Lay leaders take care of practical matters, such as paying the bills, cleaning and set up for meetings, etc.