It is one of the most misinterpreted songs of the 80s, perhaps second only to ‘Every Breath You Take’ by the Police. ‘The Future’s So Bright, I Gotta Wear Shades’ was written at the height of the Cold War when many people were generally worried about a nuclear war. The MacDonalds were a bit too subtle with their songwriting. A nuclear science student reaping great financial rewards due to the arms race while focusing on how much beer they could buy on fifty thou a year was meant to be a satire of the early 80s in America. Did you have to wear shades because your future was so bright, or because the future might be lit up with nuclear blasts?
I encourage you to dig up some other albums by Timbuk 3. They had a unique sound and a very intricate, folk inspired approach to lyrics that went unnoticed under the experimental 80s studio technology.