In this low condition, he came to his senses (Luke 15:17). He decided to go back to his father and work for him. Surely he would be better off to work for his father than for a foreigner. He fully expected to be hired by his father as a servant, not to be taken back as his son.
Martin, John A. “Luke.” The Bible Knowledge Commentary: An Exposition of the Scriptures. Ed. J. F. Walvoord and R. B. Zuck. Vol. 2. Wheaton, IL: Victor Books, 1985. 245. Print.