How low can you go in paying a worker?
There should be no limit to how low. In fact, in the law as it now exists, many workers work for $0/hour. They are called volunteers. What they do is perfectly legal, but if they were to get a raise to be paid $1/hour to pay for their gas, suddenly they would be law breakers. In fact, if I want to work for you, and I want to pay you money for the privilege of doing it, effectively working for a wage below zero, nobody has the right to tell me I can't.
Are you advocating taking advantage of desperate people?
Of course I advocate that! The only way I could not advocate it would be if I hated desperate people and wanted them to be remain in their desperate situations. Any time two people make an economic arrangement where they each give the other something in exchange for something else, whether that be in the form of a job or the purchase of something at the grocery, both parties are taking advantage of one another. For many desperate people, the best way out of their desperate situation is to offer their labor for what you might consider a very low wage, hoping that some employer will take advantage of their desperation by hiring them. This is always a good thing for both parties involved.
Here are some other examples of where self-righteous politicians have prevented desperate people from improving their lots by enacting laws that prevent those desperate people from doing the very things they need to do:
banning the sale of organs, banning price gouging during natural disasters, and banning child labor. I'm sure I could go on.
Incidentally, I'm not an an-cap. I'm just a lover of freedom and hater of tyranny, who thinks we'd be a lot better off if the people who took oaths to uphold the Constitution would do so. And I'm pretty sure the views I've expressed are the standard Austrian economic views, and the views that Ron Paul also holds.