Without the sophisticated financial setting of modern banking, when a person owes a debt to another and is unable to pay, s/he is either put in prison, or has to work off the debt. There are strict financial guidelines in how a person can charge interest towards another, so the issue of forever in debt was addressed.
Another example is a prisoner of war, in which a captured person is either killed, or has to work for the victor. It is only until recently, and in most 1st world nations, where there are enough resources to be shared by a large number of people, and people are free to do whatever they want. However, in biblical times, people are faced with issues of constrained resources, and adding another person into a society often times put a heavy burden on the society as a whole. The fact that prisoners of war were allowed to stay in the society without being immediately killed off in some cir stances, but to take a lower social status, but with rights afforded by reasonable people in biblical times, is a luxury to have.
For a person who likes to talk about reality, you sure don't have much of a grasp of it.