The idea of POPs is the hardest thing to grasp in the game and that is partly because the development of POPs in gaming terms could have used work. When the game first came out POPs were little understood and it took a while for people to master manage them.
I would have much preferred a system whereby POPs manage themselves and have a fluid and automated system by which they moved up and down in society based on hard work, luck and education.
Instead we have the gamey system where we can move the job system and lifestyle of millions of people.
I never liked the POP system in its current form
I am not exactly sure if you know this, but in Victoria 2 bolded part is true.