I have not looked at that directly, but my concern is primarily not how much is given, although that is important, but where it is given. Typically, large donors are inclined to give to education or to cultural organizations. Here's my question to the government: is that where you want your tax dollars to go? It's not simply a matter of quantity; it's venue, I think.
On October 3rd, 2012. See this statement in context.