But we know from nature that this needn't be the case. Look at a school of fish. There is no hierarchical command structure, nor any democratic council of the fishes, or anything like that. Their schooling behavior is emergent behavior from each individual fish following more or less the same rules as the other, coded in their DNA. They take cues from each other, go with the flow, but they're not actually conspiring with the other fish. There is no Fish Illuminati, just a bunch of fish doing normal fish things.
The failure to recognize the possibility of emergent (or convergent) behavior in humans is I think the root cause of many conspiracy theories. This is related to the concept of pareidolia, e.g. seeing patterns when there are none. In this case there are genuine patterns (fish clump up in schools) but the explanation offered up for this behavior is erroneous (fish Illuminati.)
It's not like some secret cabal where they sit around in black robes and vote on how to maximize false arrests for profit.
Do you think out of every one of the millions of people in that system that literally every person has absolutely no intention other than profit? Yes, some people within the legal and even prison system have good intentions. To think otherwise a pretty cartoonish world view.