I worked with someone whose father drove his whole family out of the killing zone in Bhopal on a two wheeler. There might not have been a strong international movement to enforce safety first behavior on transnationals, but there was fall out.

US government actions demonstrate the value placed on a life in another country can be much lower than the statistical value here in the US. We could save a life for a few thousand dollars with malaria nets (or so it's claimed); domestically a value of $12M per saved life is considered enough to justify some safety improvement.

Because it happened in India, from perspective of US public: Out of Sight, Out of Mind

Frankly, I'm not in the least surprised.