If we look at giving like we do music ministry, we'll see some opportunities for the pastor and parish staff to actually encourage and support giving. The large and regular donors should be patted on the back, thanked, and even encouraged to give more. Some large donors are only giving a portion of what they can give. They are looking for and need their pastor to thank them, encourage them, and ask for more giving. Many parishioners are capable of giving much more and stepping up to significant giving levels, but one one is watching them give or pastoring them. In the same way that an amazing singer may be unnoticed in the pews, many potential large donors are not being noticed.
So, I would encourage pastors, parish staff, and development directors to pay attention to the donor rolls. This can be done prayerfully. Ideally through conversation and discernment, a pastor will feel led to deepen his relationship with some donors in order to thank, encourage, and increase their giving.
Much like a pastor should know which parishioners are doing well in music, volunteering, serving, and outreach, so he should also know who is giving well. Giving is a spiritual gift like any other. It needs to be noticed, thanked, and fostered.