When you have openings on your staff, it's easy to get enamored with a candidate and jump to the finish line. That will always cost you in the long run. Every organization I know takes longer than they should to remove non-performing salespeople. It's just a fact. So you need to hire tough, so you can manage easy. If you hire easy, then you have to manage tough (threaten, push, and poke to get them to do what they should be doing).