Below is a link to an article about the "stinginess" of America. Several nations and UN emerigency relief coordinator Jan Egeland, fail to understand one key factor in Bush promising money for tsunami relief--Bush doesn't hold America's wallet--Congress does. Before Bush can promise massive amounts of money to help, he must get Congressional approval to spend the money.
I would also like to note that the British government's response was also a few days slow--that happens when the disaster strikes on Christmas weekend, a lot of people who make the decisions in the world are on holiday.
Is America Stingy? (washingtonpost.com)