There are possibly other examples, but I think you'll find that when profit and greed are the driving forces of a society, charity doesn't come easily. The citizens of this country DO see that the needy are taken care of. We do it through our government. No, I nor any other libertarian would ever stand for abandonment of the elderly or disabled. Man, you sound just like the Clinton White House when you get into the 'abandonment' thing.
Libertarians favor letting private charities be more involved.
Also, churches use to be MUCH more involved in the communities where they reside. I'm afraid to report, this isn't the case anymore. This would immediately free up untold millions of dollars for giving and charities. Being the typical Democrat you're probably saying right about now that you don't believe people would give of their own free will. That is the difference in myself and you.