iStock; Rebecca Zisser/BIIf you've ever been frustrated that a customer service rep can't help, you may be a victim of an "accountability sink."Economist Dan Davies uses the term to describe how companies avoid responsibility by deferring decisions to algorithms.Davies says customer feedback is often ignored when tech is accountable for decisions.It's one of every traveler's worst nightmares: You arrive at the boarding gate to be told your flight is overbooked and you've been bumped.You complain at the counter — you have an important business meeting or you don't want to miss your friend's wedding.