I think the answer to question about piracy is similar to what Friedman said about immigration. It's good for the people as long as it's illegal. But if you make it legal (i.e. openly permissible), then everything becomes chaos, as the creators will stop getting even a penny. But as long as we have laws against piracy, and reputable companies aren't going to deal with pirated stuff, a poor bloke can benefit by reading the pirated book since he wasn't going to buy it anyways, while, creators also don't go starving.