There's blame all the way around, unfortunately. MJ was going to get his "fix" any way he could. Word has it that he was using prescription meds prescribed for members of his entourage. If these people knew and/or were supplying him is something we may never know. The doctor said he was concerned about the meds MJ was taking and was trying to wean him off the anesthetic. If MJ's addiction was known to the doctor, why did doctor not put him in rehab or some kind of treatment?
The human body can develop a resistance to drugs when taken for an extended period of time. I can't help but wonder if MJ was drugging for so long the beneficial effects of his prescriptions were lost. There's also the question of drug interaction, he sounds like he was a walking pharmacy!
I always thought MJ was way overrated. But it's sad things have come to this. My hope is that someday soon Michael will be allowed to rest in peace.