As long as the most consumers and analysts are concerned on cost first and foremost, abusing cheap labors will remain rampant. Apple, Samsung, Sony, WD, LG, and the most electronics/computer hardware companies face the same challenge. It's like typical game theory situation. Unless you are sure other competitors will comply with the same rigorous standard, you dare not even try.
I don't condone the practice, but simply want to point out why they let their supply chain abuse labors. It's not because they are evil, but because they are compelled, and believe they are doing their best to fulfill their duty: to maximize profit for stakeholders. This is the capitalism of modern day.