Charity vs. politics?

Marilyn Sewell raises a familiar subject:
Churches almost always prefer charity to justice. Let's take, for example, the question of hunger. Churches find it easier to open a soup kitchen, rather than lobby politicians or put pressure on government to feed hungry people or help them get jobs. . . . What's wrong with this picture? To effect change, churches must move beyond charity to justice, changing the economic and political systems that keep people impoverished.
Along with the fact that charity is simply easier, Sewell names three additional reasons churches often avoid pursuing justice: