On Amy's point, I didn't have a clue when I graduated. I spent my first day photocopying stuff. Same goes for my wife (she's an accountant). You still need to learn skills on the job. But part of my point is that having that piece of paper helps you get the job: the other half to my point is that that education will make you better at your job.
I know so many people who do MBAs because they want to get ahead, and have an edge over their colleagues. An undergraduate degree is even more fundamental.
Rob is right to an extent, too: it all depend upoin whether you want to have a career, or a job. A career means you keep advancing. A job means you don't advance, but advancement doesn't mean you'll be happy. Best fun part of my working life was being a bartender while I went through law school. No brainer job, but really good fun.