There's a lack of uniformity and Community in that sense though. In this manner we can each contribute, and utilize the money to the fullest extent. For example;
Give to Charity I -
Person A - $10
Person B - $1
Person C - 60$
Where as here we can withhold funds as the need arises, securing a large amount of money, with a sense of being able to work together. We are helping others, teaching life skills, building a stronger community, and maximizing our potential. It makes much more sense to gather up money than have a lack of interest and give a few dollars. I completely see your point though, I just hope this helps clarify to others.