Britain's decline is 'partially' due to the contempt the ruling classes have for those engaged in actually doing something. And that lives on - that is how we (The UK) treat our engineers.
Not only the ruling classes… its been going on since about 1820, grubby industry is something to despise.
As a former doer and someone who came to despise the 'peripheral people' I heartily agree that the loss of our industries is a major cause of our decline. Get a Physics Maths or Engineering degree and head for the City for maximum salary, then retire at 40.
Perhaps British Gas's 6000 'Engineers' and that cute penguin can save us?
Al