@Phil.T.Tipp
The article is about scale (albeit manufacturing, mostly). Well, exiting EU equals losing scale ...in trade (if you really want UK out of EU regulations and stuff). 58% of UK export goes to EU.
Granted, if you go the Norwegian or Switzerland way, it's different. But Norway pays the EU about as much as a member. It also has to implement almost all regulations in order to be part of single market. Switzerland also follows rules, even in banking.
Short version: If you want to use single market, you follow the rules and pay, otherwise you're out paying tariffs. Everything else is windows dressing. Welcome to the real world.