The last part of what you said is what about 90% of the managers I've ever worked for engage in. They see employees as tools, like a hammer or screwdriver, to be used, abused, and thrown away at the slightest sign of trouble. Many of the managers I've worked for fire employees seemingly for sport. Very few have had any kindness or constructive criticism ever. It's a shame that people can't see that turnover costs money in most cases. Of course, there are employees who are lazy, crooked, or can't be reasoned with, but they are in the minority. Most people can be built up if they are treated with respect and kindness. I consistently have the lowest turnover in departments I run. They need to focus on that in college, rather than constantly covering and recovering diversity.