'[Quitting] started a cascade of resignations': IT guy quits after boss expects him to handle an absurd workload, watching the company implode as management tries to pull the same tricks on the rest of the employees

Just because someone knows how to reset the router, doesn't meant they're an IT specialist. For some reason, C-level bosses and upper management (the kind of bimbos who are incapable of any sort of 'tech' tinkering) seem to think that every person born after 1990 can handle the specialized career of an experienced tech person, even when it's not in their job description. It's for the good of the company, every employee needs to step up rather than watch their boss hire a professional.

In this case, OP was the one IT specialist at his company and was strapped doing the work of an entire department all by his lonesome. After being denied a budget to hire more experienced professionals to manage their enormous workload, OP decided to pack his bags and move on to a more appreciative, more qualified business. As OP walked out the door, the boss thought he could unload all of the IT responsibilities on the rest of the team and found that the work of an experienced professional was essential to the functioning of the company. 

Scroll for the full details including a mass resignation and employee exodus, following the belligerently understaffed and misunderstood dealings of a real IT department (and the useless boss that watched it all burn). For more quitter victories, check out this story of an overworked employee that narrowly escaped a resignation lawsuit, but got to watch his company scramble to cover his vacancy.