Stop saying "single, atomic operation" like the humans being laid off are some database transaction, for God's sake.

These people being laid off spent a portion of their lives working for the company. They might have some personal contacts they'd like to get from their former colleagues, additional information since our healthcare is absurdly tied to our employment, as well as some level of understanding as to why they're being let go.

To appeal to your purely non-empathetical side, it also is negative PR for the company and might be a deterrent for future prospective employees to know that this company likes to handle mass layoffs in a "single, atomic operation."