Whether tithes should be paid to the clergy?

Objections

Objection 1 : It would seem that tithes should not be paid to the clergy. Tithes were paid to the Levites in the Old Testament, because they had no portion in the people's possessions, according to Num. 18:23,24. But in the New Testament the clergy have possessions not only ecclesiastical, but sometimes also patrimonial: moreover they receive first-fruits, and oblations for the living and the dead. Therefore it is unnecessary to pay tithes to them.
Objection 2 : Further, it sometimes happens that a man dwells in one parish, and farms in another; or a shepherd may take his flock within the bounds of one parish during one part of the year, and within the bounds of one parish during one part of the year, and within the bounds of another parish during the other part of the year; or he may have his sheepfold in one parish, and graze the sheep in another. Now in all these and similar cases it seems impossible to decide to which clergy the tithes ought to be paid. Therefore it would seem that no fixed tithe ought to be paid to the clergy.
Objection 3 : Further, it is the general custom in certain countries for the soldiers to hold the tithes from the Church in fee; and certain religious receive tithes. Therefore seemingly tithes are not due only to those of the clergy who have care of souls.