Children working is better than a family starving to death no? Child labor laws are a first world problem, and could have disastrous consequences for the third world. Union Carbide was a corporation, a legal fiction in which ownership is divorced from responsibility, that cannot exist without privileges given to it by a state. State capitalism has little to do with actual free markets i.e. voluntary trade in a free society.
Agree with you about the TPP, though, and the way that the term "free market" is often used in the vulgar sense.