This is a pretty cynical take on the idea of retaining qualified employees during a downturn. When I hear people talk about doing what you can to not have mass layoffs I don't think what they mean is that the company has an obligation to the employees that overrides their obligations to their shareholders. The way I read it is that people are saying that retaining good employees is beneficial to the company and the shareholders compared to the morale hit of a mass layoff.

If companies are using mass layoffs to get rid of the "chaff", so to speak, then they have a management problem. Maybe all these companies performing mass layoffs do really have a management problem and hired way more than they should have. But if that's the case maybe the first step is to rectify the management problem rather than to layoff 10-20% of the staff. There really isn't a way that can be done smartly so that you retain the best people and don't destroy morale, effectively harming the shareholders in the long term.