The pennies add up, and in the case of precision parts like drill bits producing endless replacements ate up very limited capacity in certain sectors.
(Hence why paranoia about sabotage is such a persistent feature of dictatorial regimes; the subtle stuff is indistinguishable from extreme incompetence or institutional dysfunction.)
Not only that: if simple sabotage increases paranoia, then that paranoia can harm the enemy's war effort more than the sabotage.
One could argue that a lot of the so-called "research" that is conducted at government subsidized laboratories in the United States like MIT Lincoln Laboratory provides a more modern example of this same form of "passive aggressive" workplace resistance.
For example, the former technical director of ballistic missile defense at MIT Lincoln Laboratory used to build miniature Rube Goldberg-style contraptions and display them in his office just to ridicule the military's stupidity for wasting billions of dollars of taxpayer money on useless R&D programs like "Star Wars," which hearkens of course all the way back to the Reagan era.
He famously once told a Lincoln employee that he instructed his subordinates to bill hours against government programs that they never worked. Unfortunately for the laboratory, however, this particular employee chose not to join him and his colleagues in their "passive aggressive" form of workplace resistance.
Instead, he reported the fraud to the FBI, in connection with this famous investigation:
https://www.technologyreview.com/s/401412/postol-vs-the-pent...
"Feel" is the key word here; this line of thinking can be less about the reality, and more about manager's own insecurities. This makes paranoia an even more powerful force amplifier for sabotage. If a tiny act of sabotage makes managers paranoid enough that they resort to corporate dictatorship, the productivity will tank. Which will probably not help with lowering the paranoia. At extreme ends, I imagine paranoid people get routinely triggered by normal variance in systems they oversee, making the whole thing self-perpetuating.
The section where my mind was changed from "maybe this is actually a strategy" to "this is just a passive-aggressive list of grievances against anonymous subordinates" was all the machine shop sabotage suggestions. Nobody read the employee handbook when it said "sharpen your tools, store them properly, don't press too hard on your drill, and clean out the oil filters regularly", but when you say "the enemy never sharpens their tools, they store them so they'll break, and they're always pressing way too hard on the drill bits costing their employer PENNIES A DAY in replacement parts", suddenly it's your patriotic duty to do what Grandpa demands.
Everything reads like this. "Some idiot let the pilot light go out, lit a candle in the room, and then went home. Our building blew up and my precious stash of rare cigars was lost forever!" "You dumbasses flushed a sponge down the toilet AGAIN!? Are you kidding me!? WHY!?!?"