Why does Persome call the Bishop, 'the dupe of every idle scamp'?

Why does Persome call the Bishop, ‘the dupe of every idle scamp’?
or
In what ways do the parishioners take advantage of the Bishop’s kindness?

Persome calls the Bishop, ‘the dupe of every idle scamp’ because she felt that the Bishop was easily taken advantage of by his parishioners. She thought that people exploited the Bishop’s goodness and humility by fooling him. She was in fact hurt to see the Bishop sacrificing his joys and comfort for the sake of others.