People need to get passed the way people look, and what a fancy piece of paper they hold.
No tattoo's, well groomed people with fancy degree's have ran the US into the ground, I'm sure its the same in other countries as well. You never know, they might be the best employee you've ever had, but since you care more about appearance, the people you want, want more than you have to offer.
Hence attracting people that are not so desirable.