Lyric discussion by raius 

Cover art for 2,000 Man lyrics by Rolling Stones, The

I would agree with Pirtyfool22 on this one.

It suggests how new technology throughout the "space race" era and onward will fuel the business world. It suggests the dehumanization of our culture through our obsession for novel achievement, and self-improvements... as well as predicting the abstraction of individual identity that can see now in today's corporate environment: super-specialized jobs, cubicles and office plants, name tags and badges, etc.

2000 Man is engulfed in his career, he forgets his family, his wife, and kids. And they don't understand him.

Also note, the word "sun" shown here is just a phonetic play-on-words -- the actual lyric is "son". Like this:

"Oh daddy, proud of your planet / Oh mommy, proud of your son"

For those interested in contemporary perspective, check out the song "He's Simple, He's Dumb, He's The Pilot" by Grandaddy. It is a direct response to 2000 Man, written by an artist who's career in the 21st century lies within the software industry, and how he relates to 2000 man.

III