Key element is choice.
Did the 8yo have a choice in the real sense or did they feel there was no choice?
Did the TA decide what charity parents/kids spent their money on?
Whether or not donating to a charity is a good thing isn't the issue.
I hate the "first world problem" thing. Just because something is a minor problem compared to famine, war, genicide, doesn't mean it's not still crap for the person experiencing it.