Interesting pixie_woo!
From the other side of the coin, my husband is a 'Key account manager' for a global firm, selling access control and security. We are now at the point, where, although he is on a 'good' wage, we need to up the income of our family. However, for him to get onto the next rung of the ladder, we have noticed that the jobs he has been applying for all state something like ..."the ideal candidate will hold a degree ..." Now, Mr Le chat has been in the business for many years and is very wise to his craft. He has not, as yet had any replies, let alone interviews. So there is still something to be said for having a degree. (It does seem ridiculous though as I have friends who have degrees, who have not an ounce of common sense or everyday intelligence,)
On the fee front, as parents, we earn over the amount used to assess whether fees etc are paid. The simple truth is, we cannot afford to send our sons to uni as things stand. So that is also a factor.... The 'comfortable poor' who are always just over the threshold, are in a bad position.
As for your final question, I have a friend who holds a degree in chemical engineering and has always worked in I.T.!