This is a huge case, maybe rare, how money is better used than a tax payment. Non of this would happen if sunk into the government
You are saying we shouldn't have to pay taxes so the state can plan and execute vaccine campaigns and offer chronic disease treatment without cost to the patients that need it?
This is the case in Brazil (for instance http://en.wikipedia.org/wiki/HIV/AIDS_in_Brazil) and I happily pay my due to make it happen.
Not all tax money is actually put to good use, but the greater part is and I certainly wouldn't advocate against that.
Of course some countries have weird priorities IMO (yes, US) and may not share this view.