'I don't know if Trump knows how to achieve this'
He is going to slash corporation tax to 15% from its currently very high level which I think is about 39%, so American companies will be able to repatrirate the trillions they hold offshore. then he will get the best business people to renotiate trade deals with China, Mexico, Japan etc so that they slash their trade surpluses by buying US goods or he will hit them with trade tariffs. The US is the first or second richest market in the world so if it closed off to the world, then the world will suffer. The more well-paid jobs US citizens have, the more money they wil spend and the more products companies in the US will produce.
Globalisation is a trick of the globalists using big banks and corporations to invest in cheap labour areas that sell to high income areas but it slowly kills the goose that lays the golden egg. It is probably done deliberately by the globalists to weaken the rich industrial countries by forcing them to deindustrialise so that eventually the world becomes balanced in terms of wealth so that no one country can challenge them and they can achieve their world government.
Trump has challenged them, he has thrown down the gauntlet and the Trumpites have picked it up and are running with it. Trump is potting America first and ending the globalists' game.
Their global carbon tax regime where they strip teh resources of countries and eventually put them into a global type fund in order to slow down growth and human development and to control the world's resources for themselves is being challenged by Trump and America is back and will not go along with the game anymore. Trump is not bought and paid for like many of the rest of the political class so he won't allow US sovereignty to be subsumed in a globalist system. They are in real trouble with Trump which is why their minions and media worldwide are in shock at Trump's rise.
'None of us know if Trump would abandon everything he promised and just swan around in Air Force One for 4 years.'
Very unlikely because he has made lots of very powerful enemies by challenging the globalists and he has talked about opening up the redacted 28 pages of the 911 report and about auditing the Fed. So they are under no illusion that he means business.
'Much smaller, densely populated countries like the UK have insufficient natural resources for the population and have to import essential things - like 40% of out food, like duel & power.'
We have lots of farming land and could become almost self-sufficient in food as we had to be after WW! where the Germans nearly succeeded in starving us out because we were not self-sufficient. We can also make our own coal-fired power stations and nuclear plants and we have North Sea Oil, but the globalists have intentionally put a hold on coal in order to weaken countries which have it and make them interdependent on other countries so that they cannot become sovereign and independent from the globalists. We could easily make goods that meet the basic needs of the population of 60 million and which provide employment and we can then just import the things we do not make. But that does not fit the globalisation system which essentially impoverishes the people and enriches the metropolitan elites.
'So, we'd go broke and have to go begging to our neighbours if we copied this and tried "Fortress Britain" '
No, we are the fifth largest economy in the world. We could make our own goods, but our bankers would not make such large profits and bonuses. The metropolitan elite will be worse off but the millions of ordinary people will be better off.
'This is why I think our economy and standard of living would take a big hit if we left the EU
We are not sufficiently important or poweful to fend off vengeful Eurocrats'
They need us more than we need them. We are their biggest trading partner and we have a trade deficit with them. They are in a sclerotic anti-business high regulatory bureaucratic regime which has low growth. Without them and with teh right politicians we could do what America will do under Trump.
That is what our political class fear and is why they fear Trump and the Trump phenomenon becuse they know that if Trump gets in, then people here will say why can't we have some Trump and the political class will have to try and ban him again.