Pros
In short, SCIF is a job source with few demands. You can sleep under your desk and still get paid. The union will protect your job at all cost. One can sleep at night without worrying about whether one's performance will affect one's career, the company's future, or just about anything else. Advancement is relatively easy, although nepotism is rampant.
Cons
Your co-workers may be asleep, surfing the web, reading books, etc. at their desks while you do productive work, but you'll be paid just as much as them. This is the flip side of a pro. If you are a conscientious employee, you will get the shaft. Accepting that fact is necessary in order to continue working at SCIF without losing your mind or becoming a cynical, mean-spirited grouch who cannot help but express hatred for the slackers. Your co-workers' poor performance and refusal to work is rewarded in two ways: (1) they get less work and (2) you get more work. Again, just accept this if you have a shred of integrity and want to continue working at SCIF.