But what would prevent this system from being compromised?
Seems pretty easy for an adversary to "inject an exploit in these controllers" by paying a few of them to keep the knobs in the wrong position for a bit more time than strictly necessary, or to flip a switch earlier/later than ideal.
Auditing this is seems worse than checking the code for an old-style, non-networked, PLC.
In the US, I can’t afford a full time maid. In India, I could probably afford 10.
Or more pointedly, in the US you can afford a car far earlier than you can afford a maid. In India, it’s the opposite.
An interesting aspect of poorer economy I’ve noted but haven’t seen anyone discuss otherwise is you can live a much better life being poor in India, than you can in the US — the really low income economy is far healthier (the quality of everything degrades continuously). I’m sure it’s not a novel insight, but I don’t know what others would call it.
In the US you pass under the minimum wage bar of value production and you’re immediately in a tent under an LA bridge — with everyone else ranging from $7.99/hr to $0.01/hr. Of course an economy exists to support them anyways, but it’s largely underground, illegal (bypassing safety and regulations, e.g. selling very old cars; selling cigarettes individually) and actively zoned into oblivion
It‘s why, for example, middle class households in the US don‘t have live in maids, because rising living standards made that unaffordable at a middle class income level.
So the idea might not work for Iran, but it probably would for North Korea.
So yes, they can probably afford to have a bunch of people tweak knobs in a factory all day.