This generally isn't how layoffs work because if there is any correlation between performance and protected indicators (age / gender / race / etc.), then a mass

This generally isn't how layoffs work because if there is any correlation between performance and protected indicators (age / gender / race / etc.), then a mass layoff may appear to be biased and open up a legal liability. Instead, layoffs are shaped by specific reductions in funding for product areas, and a degree of randomization and rebalancing is mixed in to eliminate bias.