That's not actually the case at all companies. My employer has no problem with me waltzing in to work at 1:00 PM and leaving at 5:30, as long as I get my work done. (Granted, I'm still at work and it's 10:00 PM, so maybe it doesn't work that way. Some days of the week, though.) Conversely, if I don't get the work done, I'll be fired, even if I put in my 8 hours - I have one friend that this happens to.
