Surprised that people dislike this comment. This is a meaning for "publican" much older than pubs, and the also the meaning of "publican" as described in Wikipedia [0] and as many of us have learned at school about Gospel of Luke (where this role of a despised tax collector or collaborator with the occupying Roman empire was at heart of the parable of the Pharisee and the Publican).
(I live in Southern England, and this comment is only from my experience.)