Big government isn’t necessarily a bad thing. United States have one of the smallest governments of all developed countries (in terms of budget vs. GDP). Countries like Germany, Sweden, etc. have higher taxes and bigger governments and you can’t really say that life is so bad there.
Our healhcare system is inefficient. Two things must be done to fix it. First, prohibit health insurance companies from profiling (make sure they charge everyone fixed premiums and they don’t deny coverage to anyone because of age or preexisting conditions). Second, give tax credits to lower-income families so that no one is priced out. That’s essentially what Hillary Clinton proposes to do.