Hah. It's been awhile since sales reps were so cocky as to feel that prospects and clients were, in fact, under their thumb. Nope, when the economy got soft and business started to suffer, sales reps everywhere (and in every industry) could no longer be the least bit cavalier about their prospects and accounts. Under your thumb? Not a chance!
Prospects and clients have always had the power to prove just how much they want and need your services. They do it by accepting your proposal and then by continuing to work with you, and in this environment–heck, in any environment–you need to show your love on an ongoing basis.