No one. This is why I'll never understand the criticism and why it annoys the crap out of me when articles about working conditions call it "Apple's manufacturing plant". It's not Apple's plant in any sense of the word except that they contract them out. Apple is under no obligation or responsibility to tell manufacturers how to run their businesses and I think they deserve kudos for constantly forcing these companies to improve working conditions and pay and for doing it contractually. They're blatantly putting their money where their mouth is.