There’s a related story, unfortunately not quite as neatly packaged, and it’s about taxi drivers.
A businessman gets into a taxi and starts talking to the taxi driver about (of course) business. The taxi driver is in a great mood and explains that today is a good day, this is his last trip since he has made the $400 he aims to make in just two hours. The businessman asks him what a bad day looks like, and the taxi driver says he might have to drive for ten hours to make that $400, and he’s miserable the whole time.
The businessman asks why he stops at that specific number, and the taxi driver replies that he starts out $300 ‘in the hole’ for car and medallion rental, so he has to make that back plus some more for his take-home pay. The businessman suggests to the taxi driver that good days like these are when he should do his epic ten hour shifts, and he should go home early on the bad days even if he loses money that day, as the extra money from the good days will more than cover the small losses on the bad days.
I guess the moral of both of these stories put together is that sometimes businessmen have good advice and sometimes they don’t.