It's just that after 5 years or so, we've gotten used to it.
I hadn't heard the term "layoff fatigue" before. But, it seemed like standard procedure when staff was cut was to expect the remaining members to take on more responsibilities. That worked until the current staffers get fed up and quit. As long as there are ample people willing to fill those chairs for whatever management wants to pay, the revolving door works fine. It only becomes a problem if/when there becomes a shortage of people willing to take the grunt jobs. That hasn't happened yet.