Well, the volunteers did go to NYC to aid the Coronavirus situation and some Nurses received $100.00 per hour which isn't chicken feed. But I agree, they shouldn't have to pay NYC taxes if they aren't a resident. $100 for 8 hours =$800.00 per day X a forty hour work week (and I'm sure they worked more than forty) but even a forty hour week =$4,000 per week X 4 weeks = $16,000 per month. But they still endangered their lives-some did contact the COvid19 and they shouldn't have to pay New York taxes. That is foolish under the circumstances. Without the volunteers NYC would have been in a real mess.
But that's not volunteering... that's... well, capitalism. It's essentially like contract work, in most cases. It's a dangerous job, yes, but that's why they were making big bucks (so you say, I don't know).
It's not 'volunteering' though.