Who has the real money?

I read in the news yesterday that Azharuddin Ismail, child star of Slumdog Millionaire, and his mother have moved into a new home. They are very happy that there are 4 walls, a toilet, and a locking door. These things should remind us that we don't have it so bad after all. The other child star, Rubina Ali, is also going to be in a new home. These homes are apparently being provided by the Mumbai housing authority, who I guess sells them for £30,000 ($48,000) to whoever. A trust fund has been set up to provide for both children for education and living expenses. The producers are also suppose to set up a £500,000 ($800,000) donation to a local development charity to improve slum children's lives.
The point I'm trying to make here is that the movie grossed $360,000,000! Granted, there are expenses involved as well as the theaters' operating costs, but how much did it cost to actually make this movie? The average household income in India is $1600 per year. (I don't know if this includes the ones we all get stuck with on customer support.) I can't imagine that it cost very much to hire the extras shown in the movie. One woman said her kids were in the movie and they weren't paid at all. Of the 5 million people living in Mumbai, 2.5 million of them live in the slums. Assuming a breakdown of Mom, Dad, and 3 kids, I come up with 1.5 million children living in these slums. That's about 50 cents for each kid from the $800,000 donation mentioned above. Doesn't that make you wonder who made the real money?