As for jobs there's always work to be done. There's an infinite amount of work in fact. In a free market involuntary unemployment should be zero because someone would always be willing to pay something for a given amount of work. I have work I need done now that I just do not have time for. I also know finding someone to do that job for what I'm willing to pay is very hard since people seem to get by without working via means I do not fully understand. I'm at home today caring for my family who are basically all sick and I'm seeing a lot of men just wandering around doing nothing. I'm going to guess that the incentive to work is absent in their life for one reason or another.
Not sure libertarian means that you want people left out of the system and starving though. I am a libertarian and I've spent 90% of my time post college life running or helping to run a food pantry in my spare time. Seems silly to suggest that libertarians don't care about such things.