Father Dan Claire has a good post up at RenewDC on how healthy churches should be needy churches. He says in part:
A healthy church grieves the departure of members not because of the loss of revenue, but because of the loss of gifts. Departures drive the remaining members to their knees to pray for new body parts, so that the body might be complete, and the church might fulfill her vocation as a kingdom outpost. Likewise, when God sends new people to a healthy church, there are legitimate holes to be filled and everyone rejoices in the Lord’s provision.