A labour was digging land for pillar construction for Bangalore Metro train works. All he has to do was to dig the land throughout the day and get money for that day. His aim and worry was to get money for that day and get some work for next day/week -- be the digging work for Metro Train pillars or for a shopping complex or for road or bridge construction or a house/apartment work. He did not and may be need not know, `What he is doing for`. This labour was monitored by a supervisor, who has to get labors every day to the site and get the digging done for that day. He has to supply labors till digging is over for N number of pillars in that stretch of Metro train work. Has to search for a new assignment there after -- be it an apartment, shopping complex, bridge, etc. A pillar contractor was responsible for erecting N number of pillars for that stretch of Metro train works. He has to depend on labour supervisors for getting labors and some engineers to supervise pillar construction q...