Graduate degrees certainly don’t guarantee a job in the particular area of the south I live in. Of course it depends somewhat on the degree and what you are trying to do with it, but in general graduate degree is not an immediate job puller. I do agree with what G said, though, that a lot of grad degree holders are underemployed. My grad degree is in education and I work in the education field so it is certainly a great ROI for me, as will a Ph.D. be at some point, but not every field is like education. My brother has a very successful, very lucrative management/sales position with a large regional company. He has a high school diploma.
As someone already pointed out, education and intelligence are NOT necessarily the same thing. One of the smartest people I know on this planet went to college for 1 whole semester before dropping by out and moving on with life. One of the dumbest people I have ever known had 2 graduate degrees.