I didn't read any evidence that this actually happens, and I read the incentives differently. If I was a manager I would feel that this lowers the risk for me t

I didn't read any evidence that this actually happens, and I read the incentives differently. If I was a manager I would feel that this lowers the risk for me to hire a person - if they perform well and it really works out, then great. And if not, then I know they'll just be part of the "unregretted attrition" number that I have to hit. Basically I can just hire a bunch of people and see how they work out, keeping the ones that nail it and allowing the others to go find jobs they are better suited to. In a world where firing or laying off people is stigmatized or penalized, I have to be much more sure of the people I hire, which isn't so great since so often you don't/can't really know until you see someone in action.