Sure they do, especially if customers are using the result of the work, a song in this case. If you drink lemonade from a lemonade stand, you need to pay for the drink. Making lemonade is no guarantee of income to the lemonade owner, but if he finds a customer, he needs to get paid.
Ah, the old "Unauthorized copying is theft" fallacy. No, unauthorized copying is not theft, have never been theft and won't ever be theft, no matter how much you want it to. Even SCOTUS has confirmed that in the landmark ruling Dowling vs. US, 1985.
Unauthorized copying is a violation of rights, but it is much more akin to trespassing than anything else. It's like this. Imagine there is a lake. The lake has a beach. The beach and the lake itself is public property, but all the land around it is farmlands and thus private property, so the only way to (legally) get to the beach is by air. Those darn local people though, they do not wish to hire a helicopter ride over there. They'd rather just like to walk on the outskirts of some of that private property so they can get to the lake and enjoy a nice, cozy swim in the summer heat.
These people, trespassing on the private property just in order to be able to take a dip they, in fact, are entitled to, are technicly commiting a crime - but they do not harm any land by walking over that property, and they do not disturb anyone by simply walking. Depending on where you are from, this is even legal in some countries, provided certain rules are followed.
Are these people doing something so bad that they need to serve a jail sentence or maybe even death sentence for their lawbreaking?