"Full responsibility" is just humblebragging. Superficially, it's humility about making strategic mistakes that led to the need for the layoffs. But really, it's bragging to Wall Street. "I am tough, confident CEO. I know what takes to make shareholder value and line go up. Praise me!"
Hadn't looked at it this way. I usually interpret it as a meaningless phrase that everyone expects to be made. How often does "taking the full responsibility" have a real consequence for the top-level management? I would expect several of them to resign and the salaries to be used to pay 5x the number of employees that are way more productive than management anyway.
Yeah, like firing 12k folks isn't the full responsibility of the CEO in the first place?
Like a surgeon, telling you after the surgery that he takes "a full 100% responsibility for the results.". And you will be like: "eeeh, yeah, thought so?"