Because art is a symbol or status of living. rural cultures out in the middle of nowhere fighting to survive don't have time or resource to create something. but rich countries or cultures with money to blow have no problem spending on something cool they can create. plus it shows the world a bit of that countries style and flavor
Usually, for songs you would need to contact the publisher or composer. In this case, I believe you would need to contact the band's agent, or their record label.
