Protestant ministers do not receive a sacrament, which is an outward sign instituted by Jesus Christ to confer grace. Rather, they are commissioned by their church to preach, teach, and shepherd their flock. Depending upon the denomination, when a minister retires it is like retiring from a company, and he can begin a whole new career. Also, it is not uncommon for a minister to hold down a secular job in order to support his family. Ministers are usually interviewed by the intended congregation they are going to serve. It is up to that congregation to impart salary, benefits, housing, etc. In some higher circles, such as Episcopal or Lutheran churches, a bishop is involved in the assignment of its clergy. Yet the local congregation has much to say regarding the type of clergy it desires.
A Catholic priest, through his ordination, receives a sacrament. The sacrament (Holy Orders) configures an indelible mark on his soul: once a priest, always a priest, even in the afterlife. The sacramental seal makes a priest an alter Christus, or another Christ. Consequently, the priest acts In Persona Christi or in the Person of Christ. When the priest baptizes, it is Christ who baptizes. When a priest absolves sin, it is Christ who absolves sin. When a priest offers the holy gifts to become the body and blood of Christ, it is Christ who is priest and victim. In all seven sacraments, Jesus Christ is the priest, and priesthood is the instrument through which grace is given to the people of Christ.
A priest is assigned by his bishop to a parish or ministry within the diocese. He is seen as the extension or vicar of the bishop. For that reason, there is unity in the church. A priest has his faculties to serve in direct consequences of the bishop of the diocese. If faculties are removed he cannot serve in public. Benefits, housing, and insurance are all determined by the bishop. This allows certain freedom, since it is not the congregation who approves of the priest’s assignment, but the bishop; the priest can teach and preach freely, without worrying about acceptance from parishioners.