Comment by leoh

I think this is often, but not always true. I think it's not true (and rational for employers) if they:

* have a set of interview questions that help clarify they have the "right" kind of person

* have a performance review process that ensures that hired individuals continue to engage in ways that are understood to be most useful to the company; i.e. that validate (or invalidate, as the case may be) hiring practices