America’s poor and lower-income earners give more on a percentage basis than those in higher-income groups. They tend to keep up their giving in tough economic times, according to McClatchy Newspapers.

This is a trend I've personally seen in the many non-profits my company works with. Higher dollar donors have cut back more than donors who give between $25 and $250. An obvious reason is that people who are poorer have not seen their investments decimated. And the psychological factors related to giving are affected by fear and loss.