America's Charity Divide

In America's Charity Divide, Chuck Colson elaborates on why conservatives are usually more charitable than liberals:

This should be obvious when you think about it, because there are vastly different worldviews at work here. Christians are guided by revealed truth and the wisdom of the past—what's often called the democracy of the dead. And we recognize original sin as the fundamental state of human nature, and so we are distrustful of big institutions. Moreover, Christians believe that they have a personal duty to help the poor, because the Bible commands it and because we understand that society's problems are morally rooted and, thus, more likely to need moral solutions. So, we are involved in creating what Edmund Burke called the 'little platoons' of society: organizations devoted to feeding the hungry, freeing slaves, and helping those in prison.

By contrast, the secular liberal rejects the idea of original sin. He believes that with the right education and enough money, the lot of humanity can be improved. So liberals believe that, with their superior wisdom, they can create utopia—just give them the power—which is why they believe in big-government solutions to society's problems, solutions that we now know have done more harm than good.

When it comes down to it, liberals are only more generous when they've reached into your pocket for that generosity. And the reason for that comes down to spiritual worldview.