There is a superb "10 things Employers HAVE to understand about recruiting staff" blog post by Andrew at the Sirona Consulting blog.
I think point 7 is especially important "No selling, no new staff. Interviews are as much of a promotion as they are Q&A session. Don’t assume that candidates want to work for you, they will need selling to convince them."
Not enough line manages have been taught this by HR and/or their recruitment agency.
