Walking and swimming, conjuring turtles (see my last post) and building castles… since the Brexit vote politics have been more a burden, less a pleasure – how we (as country and individuals) might hold on to our sanity while others attempt to build castles in the air.

Brexit has many castles, most of them air-borne, from the immigrant threat to free trade. Closing down on one, on the free movement of labour, runs directly counter to a fully libertarian approach to free trade – if this was a board game, or a novel, I’d want to see how it all worked out. As political reality, I hope not to.

Focusing on free trade, last week we had ‘From Project fear to Project Prosperity’, a report from the free-trading supply-siders ‘Economists for Free Trade’, chaired by one-time Thatcher adviser, Patrick Minford. Matt Ridley in The Times (21^st August) pours praise upon them. We hear the old shibboleth, ‘Fortress Europe’, curiously used to describe 28 countries which have taken down the barriers and practise the four freedoms – goods, capital, services, and labour. Ridley argues that ‘external barriers are pure self-harm’, and you’d have thought that he’d take the EU as a shining example. Instead he focuses on the tariffs the EU imposes on non-EU countries – apparently the tariff on unicycles is 15%. What he totally and wilfully fails to recognise is that free trade isn’t a level playing-field, but self-interested countries seeking common ground on which they can co-operate – not for another’s interest, but for their own. We hear from Brexiters about countries keen to reach trade agreements with the UK – but on whose terms? On ours, on the UK’s?

Garvan Walshe on the Conservative Home website is helpful on the subject. (There is an awful lot of sanity still left in the Tory party – but the sane too often these days are the quiet and the cautious.) In trade between countries, ‘the distance relationship is paramount’.

The effect of that decision [the referendum]  is to forego [the EU’s] economic benefits, and they can’t be replaced by shallower trade agreements with other countries, because they are too far away. And while there could, as Minford suggests, be economic gains from deregulation, they won’t happen while Britain´s politics is moving leftwards … Far from bringing benefits through other trade deals, leaving the EU erects an enormous trade barrier with the rest of our continent. Economists for Brexit should have renamed themselves Economists for Protectionism.

Back to Matt Ridley: ‘…after Brexit, Britain should try unilateral free trade, no matter what everybody else does’. This would Economists for Free Trade argue benefit the British economy by as much as £135 billion a year. (Compare the NIESR – leaving would cut our total world trade by a quarter.) The Minford report assumes that we’d reach an agreement with the EU broadly comparable to what we have now, and a level of de-regulation which simply won’t, and shouldn’t, happen in the current climate.

Ridley is also guilty of a selective use of history, an old bete noire of mine. He quotes Sir Robert Peel in the 1846 Corn Law debate – ‘we should cease haggling with foreign countries about reciprocal concessions’. He argues that ‘the closer countries get to free trade, the more they thrive’ – and quotes Britain in the period 1846-80, and Hong Kong and Singapore today. In all three cases the circumstances are radically different – Britain in a period after 1846 when we could dictate the terms of world trade, and two city-states (treating Hong Kong a city state) operating as low-tariff entrepots.

Ridley also attempts a distinction between the Roman civil law ‘prescriptive, rules-based system’, and a ‘better’ common law (and distinctively English to his mind) approach, ‘which is principles-based, outcome-focused, consumer-friendly’. He continues: ‘Because of our history and the nature of our economy Britain can be an effective champion of this challenge.’

The risk is all ours.

We are back, happily for my argument, to ‘castles in the air’. There is no hard evidence that ‘free trade works’, no hard evidence that supply-side economics will deliver any of the benefits (above all increased tax revenues on higher output, and collective benefits deriving therefrom) it claims.

And finally… Adam Smith. Ridley tries to corral him into the Leave camp: ‘As Adam Smith put it, describing the European Union in advance, “in the mercantile system the interest of the consumer is almost constantly sacrificed to that of the producer”.’

‘…describing the European Union in advance…’ – this is populist and emotive junk.

The founders of the Adam Smith Institute don’t do much better: ‘We both take the view that the UK now has the chance to trade freely with the rest of the world, since it will no longer be locked inside a protectionist bloc of diminishing economic and political significance.’

The EU isn’t doing too badly at the moment, and it carries political clout – the ‘diminishing economic and political influence’ will all be ours if Brexiters have their way.