Society itself is a barrier the opinion and discrimination of addicts.
The people who run things do not like addicts because when they look at them they see their own addictions and everyone has some kind of addiction.
People who like to think they are perfect frown upon addicts due to it bringing down the walls and making them face reality that they to are the same as them in a different way.
Those addicted to power and money are no different than a junkie or a drunk yet do not want to realize this as it will make them upset.