In order to create and/or maintain a closed society the people in command must control the information AND the entertainment. The messages that get regularly reinforced will teach people to believe that there are limited resources which more important than many of the people who use them. In other words, that some people are worth more dead than alive.
One group need to believe that they are entitled and therefore become active in their community and in politics so that what they see as their rights will be preserved. The other group needs to be shamed into believing they are unworthy and taught shame-based behavior. This confirms the beliefs of the first group and keeps the second fighting among each other rather than uniting and working for change.
If exclusion was just the result of flaws in the system, the plans for change would be practical and possible and more of them would be implemented. Until more people who aren't being favored are allowed to make unique contributions to society so that they believe they are worthy of inclusion and the rewards that follow, they won't honor and respect any of their so-called provisions. Even worse, they won't feel that way about themselves or anyone else.