Industry has nothing to do with it. Every country has industry. The reason the US has so many in prison is because its people are the more hair-on-fire moralistic crusaders in the civilized world and they want people in prison.
Industry is not what the prison industrial complex is.
The prison industrial complex is a deliberate lengthening of sentences and increasing of mandatory jail time for non-violent offenses designed to increase the for-profit prison population to increase profit.
"Prison industrial complex" is verbal sleight of hand to blame a system rather than people, but in reality these market forces are merely the revealed preference of what people want. If people wanted these inmates free - and by wanted I mean wanted in the revealed preference sense, not the virtue signal on the internet sense - capitalism would have them free tomorrow.
> If people wanted these inmates free - and by wanted I mean wanted in the revealed preference sense, not the virtue signal on the internet sense - capitalism would have them free tomorrow.
That’s not how the world or capitalism works at all. Plenty of people want things and don’t get them.
If you are referring to “a majority of people” then it’s still not how it works - for example the structure of the existing system affects it (see no president Clinton). There is much more to decisions and change.
In this case, a minority of profit seeking people with power use levers of control on decision makers and propaganda to create public policy.