I feel stupid for not "getting" it. There's clearly some philosophy behind it, but the "time goes by very fast", "life gets wasted in big cities", "living for work and working for life", and "evil corporations will take over the world" thoughts seemed too obvious.
If Pam hadn't said it, I wouldn't know this was The Sims's theme song. It actually got me thinking that maybe they recorded it slowly, perhaps in the same speed as the video, and then made it faster to create that jolly one we know. Is this why so many people fail when trying to replicate the music with their instruments, or are they just bad anyway and I'm being crazy?