Answer:
They are definitely responsible.
Step-by-step explanation:
Denis Arnold and Norman Bowie advocate for corporate responsibility in their article "Sweatshops and Respect for Persons" (Business Ethics Quarterly 13 - 2003).
"MNE's have a moral duty to ensure their business partners respect employees by ensuring that human rights are not violated in the workplace."
Corporations can't turn a blind eye on abuses committed in countries where they outsource their production.