Bill you are hilarious, you "used a colloquial expression" as an excuse for poor research and then immediately accuse "management" of not wanting job descriptions.  It's OK for you to be nebulous but evil managers must document minutia.  
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In your world workers apply for jobs not knowing the requirements and then "management" says "go work bra".  When exactly do you work Bill?  Even pineapple pickers hove some of the basic skill you lack.
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What's readily apparent is that you are totally oblivious of the workings of even a shave ice stand. As of for the teachers, they are part time workers (based on Federal job descriptions) paid extremely well. If they can't stand the heat they should get out of the classroom.