I see nowhere in the article that says the clerk shut down all the pumps. Citation, please?
Well, kid, as to the time taken to notice, it was long enough to obtain an emergency kit. It's not stated if such kits are kept on-site or if it was obtained by a manufacturer. In either case, the expedient of an Out of Order sign would have bought some time.
My first job was washing dishes at a restaurant. There is no crappier, not-worth-the-pay, unskilled labor job, and it remains so to this day. Let's put a parallel situation into this:
To wash large numbers of dishes, you put them in a rack and then place them at one end of an industrial dishwasher. They come out on the other side. They have sensors (even at that time) that stopped the conveyor belt to ensure that it didn't slide off the end and destroy the dishes within.
However, these sensors sometimes break -- not surprising in an area with high humidity and corrosive detergents. When this occurs, should I:
A. Allow the racks to fall off the end of the dishwasher, thereby destroying all the dishes therein (as well as causing a significant safety hazard to the surrounding environs due to broken glass).
B. Watch the end of the dishwasher and grab the racks as they come off.
By your account, it would be (A), as I wouldn't be earning enough to do (B).
Pay is irrelevant. Common sense, attention to detail, and a desire to do a good job regardless of pay is what's relevant.
(I might also mention that one of the other dishwashers was developmentally challenged, operating on about the 10-year-old level. Even he knew to grab the racks.)
Also, I'd note that your math is off. $3.00 in 1981 is $8.71 today. However, due to the nature of the restaurant, someone doing that job today would earn at least $9.00/hour -- significantly more in some States.
Here's another thing that goes over your head, kiddo: when you make stupid mistakes that cost me some percentage of $1800 (versus your $12-$15/hour wage), you're never going to advance. Want to keep your crappy $12-$15 wage (or be fired)? Feel free to keep screwing up.
The world owes you nothing. You either do a job worthy of advancement, or you flip burgers for the rest of your life. Grandpas like me will neither promote nor hire you when you're cost us money, regardless of your pay.
Gotta remember, sonny: you don't own the joint. We do.