A paper called “Church Based Organizing: A Strategy for Ministry” presented be the Gamaliel Foundation, makes an interesting claim about the new focus of congregations:
Fifty years ago, the self interest of the church was to respond to the problems of poverty, poor schools, lack of health care etc. affecting its people. Today the self interest is still there; but a more powerful self interest is the very survival of the congregation.
Here is more about Gamaliel Foundation.