Roman Catechism 21.12

Chapter 21 — Part II: The Sacraments — Holy Orders

Section 12. Some are attracted to the priesthood by ambition and love of honours; while there are others who desire to be ordained simply in order that they may abound in riches, as is proved by the fact that unless some wealthy benefice were conferred on them, they would not dream of receiving Holy Orders. It is such as these that our Saviour describes as hirelings, who, in the words of Ezechiel, feed themselves and not the sheep, and whose baseness and dishonesty have not only brought great disgrace on the ecclesiastical state, so much so that hardly anything is now more vile and contemptible in the eyes of the faithful, but also end in this, that they derive no other fruit from their priesthood than was derived by Judas from the Apostleship, which only brought him everlasting destruction.