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These migrant workers don't have any properties in their native places also. There also they have to go to work. But getting work there also is difficult. So they may be preferring coming back as already they have some work in their old place of work. That is why they are all coming back. How long they can survive by depending on somebody.
Many middle-class people are also suffering a lot without money for day to day expenses. They are also going for daily wage works so that they can manage.