There's much discussion of orphans and displaced children throughout the film and an orphanage (now in ruins) is at the centre of the story.

One discussion is the very different experience of Bruce Wayne after his parents are killed compared to that of those in an orphanage where 30 children are crowded into a single room.

Catwoman's back story is that she went into the 'care system' as a 7 year old after her mother was murdered.