In all due respect, I don't think scumbag is the correct term. Many decent people (including our men and women in uniform) become addicts when they suffer injuries and take pain medication for an extended time. Everyone I know breaks free, but they are not scumbags while they are still in the grasp of dependency.
In fact, I recently had a serious bicycling accident (I ride for exercise--I used to race as an amateur). After recovering from 3 broken ribs and a punctured/collapsed lung, I had to go through the standard withdrawal symptoms from the medication the doctor had me on.
It took the better part of the week for the withdrawal symptoms to leave...but I didn't think of myself as a "scumbag" during that week.
I wouldnt call anyone who got hooked on prescription drugs for a short while a scumbag. I wouldnt call all addicts scumbags.
This guy is addicted to Liquor, sex with hookers and who knows what else? He trashes hotel rooms and uses his celbrity status as a shield.
He isnt just addicted, he has been to rehab on several occasions. He has admitted he has no particular interest in straightening out his life.
He is a scumkbag and an addict. Hence Scumbag addict.