It's been a while since I used Firestone tires, but I'll bet anyone quite a lot that their product development and quality control have very little to do with their human resources practices in the third world. (Even though I think they sound really good, too.)
They have that money to spare because their customers think their products are desirable.
It seems to me you're trying to detract from what happened here by trying to argue that their products aren't that good? I'm not sure what you're implying, but I'll repeat, they've only been able to help, even as a marketing ploy, because they have accumulated profits - proof that their customers value what they produce.
The quality of their product, in the eyes of their customers, has everything to do with their ability to pull off this stunt.
What I'm saying is that there is no correlation between their success in dealing with an infectious disease in the area around one of their facilities and the quality of their consumer products.
I see some correlation there, no?