Why would someone become a gaoler and spend their time watching over prisoners? Because…

Clothing made for criminals and prisoners

The Golden Gate Skyprison is a triple-max prison floating above the Republic of California

Ding Ziu translates to 'Substitute Criminal'

Prison isnt the end all of dealing with criminals, dissidents, and the unwanted

30 Prisons, some of which are dreadful places in which to be, whilst others can be surprisingly pleasant, as far as somewhere can be pleasant when you are not allowed to leave it. Some are short term places of confinement, others are where you will spend the rest of your life unless you manage to escape.

Most criminals who are locked up as a punishment or to await trial are just confined in regular cellblocks or jails, but not all of them. Some are so dangerous that ordinary prisons just will not hold them. Others have secrets that cannot be allowed to be spread, or their crimes are so dreadful that they deserve a greater punishment then normal incarceration or even execution. In yet other cases the ruler had a nasty sense of humour...

Incarceration in the Cosmic Era, adjustable for futuristic and dystopian settings

One of the largest and most famous cryodetention centers operated by Creative Incarcerations Corp