Massachusetts auditor Suzanne Bump’s office identified $15.45 million in public benefits fraud in fiscal 2016, a 12 percent increase over last year, according to an annual report released Tuesday.”This is not an indication of more fraud, but that we are getting better at identifying it,” Bump said in a statement.The average size of the fraud that was identified also increased, by 21 percent, to an average amount of $14,700 per incident.