I think that in this case, we’re seeing how the Imperial mindset is slow in changing to the success of the Rebellion at Aldhani.
The prison system is likely a carryover from the Republic, although with some additional levels of ruthlessness added in by the Empire. By gaming the production system in the prison, the presumption is that the inmates are too caught up in the game to plot insurrection, while others just want to keep their heads down and get out. Up to this point, the sentient workforce is cheaper than droids because they’re already there. The imperials are so confident in the system of this prison that they’re willing cut costs by understaffing it.
Now, thanks to Aldhani, we now have the PORD. This is vey much in line with the Tarkin Doctrine, and is an attempt to reassert control through fear. Now, you can be sent to prison for 6 years, just for looking at a Trooper the wrong way. Short of just disappearing people yet, the Empire instill fear in the population and gets a cheap workforce without additional investment. Some of the inmates have heard about the PORD, and are desperate to see if Cassian knows anything, about sentencing changes.
However, the new regulations mean a learning curve in an understaffed facility. They also didn’t take the minutiae into account. The prison admin screwed up while working with the new directives, and word got out through the inmates. Because of this, rather than instilling greater fear, the inmates will decide that they have NOTHING LEFT to fear.
Were it not for the PORD, the prison labor force would continue to be more economical than building droid factories. However, now that they’re switching to a model of endless incarceration, you open up the doors for exactly the trouble that Wolfsburg describes.
Much as Dedra and Luthen realize, the Imperial overreaction is going to spur the rebellion on. The jail break is a microcosm of what will happen on a galactic scale.