I don't blame you at all - that really is a bit crap.
That said, we do often screen applicants we are less confident of, via brief skype interviews - then invite in the ones who come across well in that for a proper interview.
It is a little impersonal but it saves wasting a lot of time and...
We actually got this answer last year, from some chubby, chavvy, middle-aged woman who applied for one of our admin roles.
"Why are you looking to leave your current (very, very similar) position?"
"I'm looking for an easy job. They keep asking me to do too much work"
In the 20+ years of interviewing prospective recruits, I can't remember ever NOT asking them why they were choosing to leave their current role.
It is a good leading question, and allows the opportunity for very good (its not challenging enough / I wanted a role in an organisation with a clear...