Big companies have a responsibility to check that their supply chain is not exploitative or life endangering people. They do that partly out of self interest. If their company name is associated with avoidable catastrophies such as a building collapse killing hundreds of people, then their brand is tarnished. And that could dent sales and profits. But this is big business, so if a problem (lots of dead workers) arises, they will try to pay as little as possible to make things better.
The hypicrisy of a company that preaches ethical trading and global equality, then paying out a pittance to third world victims of their supply chain, is what makes the Number Crunch interesting.