Let me expound a little:
Hireling: a person who is paid for doing a job that is not respected or that is considered morally wrong (Miriam-Webster Online Dictionary)
Servant of God: 2 Corinthians 6:1-10 (NKJV): We then, as workers together with Him also plead with you not to receive the gr…ace of God in vain. 2 For He says: “In an acceptable time I have heard you, And in the day of salvation I have helped you.” Behold, now is the accepted time; behold, now is the day of salvation. 3 We give no offense in anything, that our ministry may not be blamed. 4 But in all things we commend ourselves as ministers of God: in much patience, in tribulations, in needs, in distresses, 5 in stripes, in imprisonments, in tumults, in labors, in sleeplessness, in fastings; 6 by purity, by knowledge, by longsuffering, by kindness, by the Holy Spirit, by sincere love, 7 by the word of truth, by the power of God, by the armor of righteousness on the right hand and on the left, 8 by honor and dishonor, by evil report and good report; as deceivers, and yet true; 9 as unknown, and yet well known; as dying, and behold we live; as chastened, and yet not killed; 10 as sorrowful, yet always rejoicing; as poor, yet making many rich; as having nothing, and yet possessing all things.
Think about it, how are you treating your Pastor?