Shirish Dai and MazeMyan, thank you so much for posting those documentaries.

That is so true, it depends on how the kids are taught at their house to treat the housemaids/helpers. I had Tharu helper too. She was brought to my house when she was 7 years old. My baba and mami admitted her to one local school. Me and my brother were not allowed to raise our voice at her. She was always treated as a part of our family. Now, she goes to college and will get married once she is done with her studies. She takes care of my parents thousand times more than I do.  So, I believe doing good deeds is always worth it and there are some households who treat these poor kids nicely too.