I would try to gently put them on the back foot when they offer a wage. When you receive the offer, you should comment on the differential between expected and offered wage, even if you intend to accept. For example, you might say with a gently puzzled tone, "this is lower than what I would ideally be earning, based on my experience and capabilities. Can you explain how you came to this number?" You may be able to pu…
Your question resonates a bit with the "Never Split the Difference" method of asking an open ended question immediately after receiving an offer. "Can you explain how you came to this number?" is similar to the "How am I supposed to do this?" kind of open ended question the author uses as an example. Happy you posted this, feel like an idiot that I've never thought of using that exact phrase lol.
While the general advice of open ended questions is sound, this question rarely works with companies. They'll simply respond with a vague answer.
"We did market research and determined that this is a competitive rate for your skills."
You have to counter that showing actual market data that disagrees with them.
I'm a but surprised no one mentioned the other "trick" in NSTD: Politely insist on a fringe benefit that they cannot provide (e.g. N weeks of vacation). This will make them more likely to increase the compensation to counter the benefit they cannot give you.