Glad to see some answered even if I disagree with the reasoning.
The question is a moral question, not sure how many here have ever read Derek Parfit but it falls into the area of how we should live and how we want our world to be. If it were our child in need, we would willingly pay much more than 5% percent for good healthcare. Well most of us would.
I think the golden rule answer would be 'yes' as I would expect the same treatment as any American would get. Karen Armstrong: Let's revive the Golden Rule | Video on TED.com Would the modern American libertarian answer be 'no?' And please emergency room service is not healthcare, we need to be honest here. Any answers?
"It is not enough to ask, Will my act harm other people? Even if the answer is No, my act may still be wrong, because of its effects on other people. I should ask, Will my act be one of a set of acts that will together harm other people? The answer may be Yes. And the harm to others may be great." Derek Parfit
"Acts are not made right or wrong simply by people believing that they are right or wrong. ... Relativists think that moral absolutism is a bad view, encouraging intolerance and so on. But I ask them: Is absolutism only bad in a relative way -- only wrong for them and not necessarily for others? If so, then it might not be wrong for me. I can believe in it and act on it. On the other hand, if it is wrong for everybody, then it is absolutely wrong, which contradicts the relativists [own] position. So moral relativism is either self-refuting or it has no claim on my moral beliefs." Colin McGinn
Instead of putting yourself in the shoes of the savior by 'generously' offering other people's money (a hallmark of socialism), perhaps you should put yourself in the postion of the person who needs saving.
Is it moral of you to obligate that someone else give their money to fix your problems?