If I heard that and felt I was going to walk away anyway, I'd be tempted to throw back "How much do you make?" And watch to see if they squirm to not share.
If they came back with "what I make has nothing to do with this position you're being interviewed for" come back with "then neither does my previous salaries, if they do then I need to know how much other folks in other positions in this company make so I can gauge whether I think this company will still be here in the future."