so·ci·e·ty noun \sə-ˈsī-ə-tē\
: people in general thought of as living together in organized communities with shared laws, traditions, and values
: the people of a particular country, area, time, etc., thought of especially as an organized community
Society - Definition and More from the Free Merriam-Webster Dictionary
If the prison were isolated on an island in a distinct place or on the moon then it probably wouldn't be a part of the society... but as most prisons are just in a different part of town they are a part of society. A prison is of a particular country, area, time. A prison is a part of organized communities with shared laws, traditions, and values. A prison has workers that go in and out of the prison on a daily basis to homes and other jobs that are equally a part of society.
You are letting the common term: Remover them from society... to mean everything. It doesn't literally mean remove them from society but rather to isolate them from other members of society in a more secure manner so as to effectively not have to worry about them.
For. But with conditions.
Several jurisdictions in the United States have re-introduced prison labor. In recent years, Maricopa County, Arizona, which includes Phoenix, Arizona, and its Sheriff Joe Arpaio, have drawn attention from human rights groups for the use of chain gangs for both men and women.
Chain gang - Wikipedia, the free encyclopedia
With regards to the rest I know that you understand and accept what I am saying it is just that you want to save face...