Why wouldn't that get results? If you're happy where you are then there needs to be a good reason to move. It's the interviewer/company's job to convince you to

Why wouldn't that get results? If you're happy where you are then there needs to be a good reason to move. It's the interviewer/company's job to convince you to move, it's their effort being wasted. If you're comfortable in your existing job then you are ALWAYS in the commanding seat during negotiations. If they want you then they will need to make an offer good enough. Otherwise you walk straight out and nothing changes. Also, this isn't something you'd say on the phone. It's what you'd say during the interview, when they can't just hang up on you. You've done the interview, they ask "So, what sort of compensation are you looking for?", then you hit them with that. If you show a weakness (a job you are actively trying to leave) then you will get lowballed. Showing that you have nothing to lose is a wall they have to scale and puts you in the best position possible for negotiations.