Still I cant believe it. 150 rs/Month wage is history of 2-3 decades ago. Since 95-98 wages have been increased a lot. Atleast 100rs per day.
India has come a long ways since then. Although the working conditions on construction sites are still far from good enough, I don't see children on them anymore, and those same workers would probably be taking home rs.5000/month today -- maybe rs.3000/month in places where contractors are more brazen about skirting the law. In any case: much better.
I live in a newer area of Bangalore and my apartment is surrounded by construction sites. There's a settlement of construction workers right across the road. What we see is small temporary one-room houses with satellite TV, and families that dress up and go out every Sunday. We even see them buying basic cosmetics in the local stores. Kids are not visible in the day time either in the settlement or on the construction sites, and I like to hope that they are actually in school.