Charity needs gesture of gratitude in return

What's wrong with some people who were assisted out of adversity by the benevolence of others, but offered no gratitude in return?

A girl who suffered from brain tumor recently received a donation of 150,000 yuan ($18,900), which had been raised by netizens. The money was used for surgery at a Beijing hospital. To the relief of the girl and those who raised the money, the operation was successful.

But to the fundraisers' disappointment and indignation, the girl and her family, who had been made to promise that leftover money would be given to others in need of help, is said to have broken their promise by pocketing 100,000 yuan ($13,000).