I dont see where this list is from ? probably made up by the same people who work out the average Wage and say its allegedly £26500 (2012 figure). I personally dont know anyone who earns the National Average wage.
How was the list presented to people to decide Im guessing a multi choice question saying what job would you like to do, and thats where Miners come out on top of least favourite, but how an Electrician and Journalist come into that list i have NO idea. The Favourite jobs look to me to come into the same category as being a Steam Train engineer/driver lots of years ago, and as the average wage figure seem to have little truth in reality.
However like many have said, The European issue of Immigrants bringing and keeping salaries down is one of the biggest problems the general public in the UK are facing, housing overcrowding is another big problem facing the UK in years to come which will be a spin off from the European Issue, i have heard of many instances of European Immigrants living 6/8 people living in a 2 bedroom house, thereby ensuing they dont have the same housing costs of a typical bread winner in a family, they can accept the minimum wage as the housing costs are minimal compared to a family trying to exist on £6.31 an hour.