I find that statement incredibly ignorant, especially since many children in the U.S., Europe, and many other countries are also at risk. I don't know if you realize this, but it's not just Asian countries, but also European, Western, and pretty much everywhere that's at risk for child-trafficking and slavery. bunnyb133is right in that most of them are very young when they start out, but really, there's not a definite age for a child to be kidnapped and forced to work, nor is there a specific ethnic group that's always targeted (although, you're right in that this sort of thing happens a lot in Asian countries).
But I doubt that the artist intended for the child in the picture to be the representation of the child slave, but instead what Pixie-Monster said, in that the girl likely represents the consumer of the products made by child slavery. Basically, I believe the art is supposed to invoke horror and disgust in the viewer for the idea that some designer brand that they or their child buys, could possibly have been made by a child-slave. The skeletons are likely meant to symbolize the deadly fates of these children forced into slavery, and the fact the skeletons are slightly holding this girl is likely meant to further invoke emotion since it's implying that the consumer is just as guilty as those who keep the child slaves.
Huh. Alright then. Didn't mean to be so serious if it was only meant as a joke. I honestly thought you were one who believed that crap and it got me annoyed, but really, I ended up getting too serious about it too. Let's just forget it then
Well, that's true. And it's not like you were being morbid about it. Just like how there will always be war, there will always be people forcing other people to work under bad conditions against their will. It's a horribly unfortunate fact of life.