Meh. In the real world most libertarians I've met believe that charities, churches and communities should take care of their own, not the federal government. I'm not saying I agree with that (I don't), or that I think that is good policy (I don't) but I think it's unfair to attribute hypothetical motive to people's political opinions. As I said, I think most people want what (they think) is best for America and their fellow citizens.
Suggesting that libertarians as a whole are sneaky fat cats consciously scuttling the ship and tip-toeing out with the lifeboats while everyone else sleeps is ludicrous. Have you ever tried to see things from their perspective? It's possible to disagree with someone without assigning a disrespectful interpretation to their motive, you know.
Some libertarians want to abolish the FDA and other important and useful government agencies. I'm not in that camp. As Tvash said, there is a wide spectrum of what encompasses libertarian beliefs.
I don't necessarily believe that private charities should handle all the social services for the needy, but I do believe we need to manage the scope (i.e. limit) of federal charities and make sure they are not abused by freeloaders. With a charity you at least get to give money to those you have faith will use it wisely - and withdraw support when you learn or suspect otherwise, or when need is less.
Fundamentally I want the government to mind its own business and let people live their lives. That's why I supported gay weed. I'd even support some profoundly stupid, posturing dumbass taking LSD and climbing and bragging about it on the internet - as long as he didn't hurt someone doing it.