Even Ford realised that it was in his best interest, for his workers to "only" work 8 hours a day, since their wellbeing was the prerequisite for the labour pow

Even Ford realised that it was in his best interest, for his workers to "only" work 8 hours a day, since their wellbeing was the prerequisite for the labour power (they were selling to him precisely at a price point lower then it's value) that was the basis for his value production and value extraction.