The idea in The Man that Would Be King was that the music should recreate all that majestic surrounding and emphasize the adventure, but also speak about the frustration or, rather said, the curse of both protagonists, even before happened what happens them.
Methamphetamine is a hideous drug. Meth makes a person become paranoid, violent, and aggressive - making them a serious threat to society and law enforcement. And maybe more importantly, meth users are a threat to their own children and families.

