Artists need to be paid just like everyone else. The fact that they get paid so much more money than most of the rest of us do is irrelevant. It doesn't mean we are entitled to steal from them. If you are pirating music then you are cheating the artist. And if you enjoy the song why steal it? I mean you can probably buy it off iTunes for 99 cents to a $1.29
That said, I must admit that I enjoyed Dan Bull's song. It is funny, but I don't think that pirating is funny.
We can't force everybody to go open source, and we certainly shouldn't complain when other people complain about getting their work stolen and distributed without getting any benefit from it.