As much as I can actually see your sentiment, In MY opinion charity collections and fund raising needs to be something people WANT to do, not be forced into or made to feel bad about by others, you questioned what people last spent a tenner on, with respect sir it's not your business, people's...
Your "imagine...." scenario happens all the time I'm afraid, however I'm just pleased that due to your user name you're not a Palace fan otherwise (and I don't like the sound of this) some people might read your post and think, if that's his tone I'll donate elsewhere.