Lyric discussion by Baller 

Cover art for Viva Las Vegas lyrics by Dead Kennedys

I think you've got it mixed up there. The song was put into the end of Fear and Loathing and it appears with an exerpt on the soundtrack. Obvously it's not on their album since the movie was made in the 90s.

It's kind of like closure to the beginning, on Kill the Poor where the rich and conservatives would rather do away with poor people than help, and this example of the way a lot of people become poor: by wasting all their money on gambling and drugs.