The parable of the labourers in the vineyard, who are paid the same wages for unequal work, is exclusive to the Gospel of Matthew. Many are of the opinion that the original parable ended at 20,13 or 20,14a, and what follows from 20,14b –16 or 20,14-16 are Matthean additions. The parable narrates how the landowner himself goes to the market to hire labourers at different hours and even at the eleventh hour. While the first group of workers is told explicitly that they will be paid the day’s wage which was one denarius, while the others are told that they would be paid whatever is right. When the time for payment arrives the focus is on the groups hired first and last, with the last being paid before all the other. They are paid one denarius, which is the day’s wage. The last are also paid what the landowner agreed with them. Since the parable does not speak about the amount work done by each group or say that those who were hired at the eleventh hour did as much work as those who were hired in the morning, it leaves the reader stunned. This ending upsets and challenges conventional values. The point that Jesus seems to make in the parable is that the tax collectors and sinners will be given the same status as those who have obeyed the law.
The additions by Matthew stress the jealousy and envy of those who were hired in the morning. The objection is not to what they have received but about the fact that the others have received as much as they which they regard as unfair. The difference is that they have received what is theirs through their hard work and effort; the others have received what they have because of the landowner’s generosity.
If one can identify with the group who complains, then it is time that one checks one’s motivation whenever one does good, because if one does not, one will continue to get frustrated at what one sees happening around one. Is the work that you do reward in itself? Or do you expect another reward?