I'm not sure whether you are making a connection between the first two sentences of your post, GreenGran.
I agree that not everyone works in the same field as their degree. People with degrees in Classics, Literature or History, for instance, are quite unlikely to do so (unless you count teaching those subjects to a new generation). What I disagree with is that this means that their studies were a waste of time and money, as getting their degree has also taught them how to carry out research, to meet deadlines, to think critically, to collate information and synthesise it, and countless other transferable skills.
The also learn how to get along with people they probably would otherwise not have met, to live independently and all the other social benefits of the University experience.
I feel like I am repeating myself to the point of tedium, but I really don't think that people should go to University simply to 'buy' a degree. Maybe if they do, they risk being disappointed, however, as not everything comes down to a financial arrangement.
If people want to train for a job, as opposed to get an education, there are vocational courses in colleges that will do that, although it is fair to say that the FE sector has been sorely neglected over the past 15 years or so.