I think you meant the industries' prices instead of costs. Take the hypothetical of costs declining massively on everything: Instead of donating tons of cloth

I think you meant the industries' prices instead of costs. Take the hypothetical of costs declining massively on everything: Instead of donating tons of clothing, we donate tons of food, building materials, cars, etc, since they are dirt cheap. Eventually this leads toward the techno-utopia of having all earthly needs provided for by technology for free. So the jobs in Uganda are no longer priceless, they're unnecessary. I don't believe in Utopias, but you get the point.