I Have heard it is the same for Law and other business professionals as well. Simply due to the fact that so many LDS folks or their spouses want to move "back home" that they are willing to give up pay to live near family. So you have a lot of over educated, hard working people in a smallish population.

Its too bad, because Utah is one of my favorite states, but this reason alone make it almost impossible for many to live there and get compensated what you are worth (even taking "cost of living" into consideration).