The Gen Y’er in a 3rd cycle of seasonal work took the intiative to cut back his hours, eliminating an inactive period and thus saving the employer money (unwisely -- thinking that this being a good idea would be enough). The Boomer terminated the GenY’er without explanation (unwisely -- thinking that this being a clear and well documented infraction would be good enough). The GenY’er protests and is left wondering about loyalty and commitment. The Boomer shrugs it off as another unfit GenY’er.
… and the same story echoes back and forth across the age gap from one place to another from one situation to another, till the prophecy becomes self-fulfilling and no one knows how it came to be.