Hmmmmm...let me scratch my head here Rabbi and ask myself why you would need proof that people give less money to charity during hard economic times
I admit that it does sound contradictory, however, if we could religion as charity I think I might explain: Whenever we have an acceptionally bad harvest, we always sacrifice MORE offerings to the gods.
It isn't that contributions decline. That's a given. It's that contributions decline to the point that essential services are not offered is the issue. That is Nutwinger's fantasy that he will not provide evidence for.
"Essential Services"
I suppose you mean bussing crippled retards to school where they MUST take 3 years of Math to graduate, and watering the grass on their football field costs $10K a year?