Finance has done well in the UK due to London and having a significant number of firms in a single place. I can get a new job for a different company, doing a similar thing, in the same building.
How does that work for any other industry in the UK?
Its no wonder that wages haven't risen when moving job also requires you to move house/schools/away from friends and family.
We need the government to get involved and create regional hubs for different industries and really facilitate giving them everything they need. Address transport, power concerns, housing, labour and education requirements. The government is in a far better place to be able to influence across all these requirements.
I don't know about other industries but in silicon there are a few hubs - especially Cambridge, Bristol and London.
When I lived in London there was a big start-up scene around Hoxton.
It's not going to happen for consumer product type things (think Dyson) though because none of the manufacturing is in the UK. Who gets injection moulding done in the UK? Nobody. Dyson is a rare exception and even then it's only R&D that happens in the UK - manufacturing is all in Malaysia.