Jesus copied the bread because the people couldn't afford it themselves. If they didn't get the Jesus bread, they wouldn't have been able to pay the baker for the bread anyway. So, the people get the bread, the baker doesn't lose any bread, and the baker doesn't lose any potential customers because they never were in the first place.
I'm not saying that all pirates are similar to this, but I think that the majority of pirates wouldn't have paid for the content if piracy wasn't an option. In fact, they get exposed to the content (game, music, whatever) and that equals increased customer base, which increases sales.
Copyright infringement and stealing are two different things. For me, all my music is pirated because the majority of them aren't even published (game soundtracks). I don't want CD's because they're silly and take up space, and buying from an online stores offers zero improvement over the MP3's I already have (unlike, for example, Steam, which adds value with automatic updates, centralised game lists, and so on). I would pay for more music if I could use the tracks in my own works under a creative commons license without the threat of having my ass sued off. The music industry is fucking itself over at the moment and only has itself to thank.
I pirate games that I wouldn't buy to see if they are any good. If I like them, I buy them. If not for piracy, I wouldn't have ever bought those games. Piracy can, in some situations, increase sales. The game industry is starting to adjust to piracy by offering more multiplayer elements, which increase piracy-to-purchase rates.
Of course you have the people who can easily afford the stuff, and would pay for the content if they couldn't pirate it - but pirate it anyway. This might be considered "stealing", but not in the literal interpretation of the word. The majority of pirates are just infringing copyright, not stealing.