Earlier quoted context omitted.
But we're talking about someone who already has a job, and the new company wants to entice away from that. What kind of negotiating tactic is it to start at 60% of current salary?
Well, the OP mentioned that the recruiter thought the candidate was lying which is why they low-balled. So that explains the logic at least. They're not stupid, but they don't trust candidates I guess. Which is a whole different thing.
It was a problematic company from the get go. I was cold called and the recruiter was very insistent. Their engineers were very unprofessional during the technical interview and complained A LOT about technical debt left by past co-workers during the interview.
Now, when I tell recruiters my minimum salary I refer recruiters to Glassdoor, just in case they doubt me.