If we did, I would advise making the standard cells bigger than normal, I would make them U shaped and interlocking so they share water lines with a slightly partitioned toilet and another slightly portioned sitting area and work space to give them some dignity and encourage them into a new profession. I would also add oubliette type cells, they would be small box cells that are a hole in the floor and the door to the cell is the ceiling. Those cells would be for shoplifters to stay for 3 days or people that commit crimes in prison to stay for a month.
A prison in my world would be to rehabilitate offenders into a new lifestyle.
