Snappy comebacks to stupid questions: the eternal undeath of the credit-card analogy

How to respond when the prime minister says something simplistic and wrong.

One of the most pernicious simplifications in mainstream politics is the "credit card" analogy. You know the one: the British economy is like a maxed-out credit card, and we have a responsibility to pay it off.

It's pernicious because the British economy is nothing like a credit card, maxed-out or not. Britain has control of the very currency in which it owes debt; it can print money to pay bills. On top of that, its effect on the economy which is its revenue source is so large that if it scrimps and saves in order to pay down its debt, there's a very real chance its income will drop by even more.

But the analogy is unkillable, and even if politicians don't cite it directly, they apply its lessons nonetheless—as Cameron did last Thursday:

Labour’s central argument is exactly that. They say that by borrowing more they would miraculously end up borrowing less. Let me just say that again: they think borrowing more money would mean borrowing less. Yes, it really is as incredible as that.

He may not have said the magic words "credit card" (or similar analogies involving "household spending" or "Britain plc"), but the same implication is made: the national debt, and macroeconomics in general, is no more complex than a family budget.

That's not true. But the thing is, even if you apply the same analogy, Cameron's claim is still over-simplistic. Here are just some ways borrowing more money can mean borrowing less:

  • You are unemployed. You have great ability, but few qualifications. You take out a career development loan to pay for post-secondary education. You get a well-paid job as a result.
  • You are unemployed. You have ample qualifications, but no smart clothes. Before the first of a string of job interviews, you borrow enough to buy a suit, ensuring that you win gainful employment and don't have to borrow money to eat.
  • You live in a 1950s prefab. With no real protection against the elements, an uncomfortable proportion of your monthly income goes on heating. You borrow money to pay for insulation, your expenditures drop, and you use the extra to pay off credit-card bills.
  • Annual income six pounds; annual expenditure six pounds sixpence. Result: misery. You borrow some money to put solar panels on the south-facing roof of you Guernsey house, reducing your spending on electricity. Annual income six pounds; annual expenditure five pounds, nineteen shillings and sixpence. Result: happiness.

I could write some detailed sophistry about how each of those analogies apply to Britain. The first is broadly equivalent to "upskilling"; the second to spending money on promoting Britain overseas; the third to fixing our much-vaunted "crumbling infrastructure"; and the fourth to investing in the Green Economy.

But I won't. Because the way to discuss the macroeconomy isn't through trite analogies and dumbed-down explanations; it's through discussions of the macroeconomy. If you want the best discussion of whether Cameron's claims are true, I recommend you turn to Jonathan Portes' exhaustive examination, or Duncan Weldon's blow-by-blow account of the squabble between the PM and OBR. You won't find many comparisons to your own financial situation, but that just means you're getting the good stuff.

Credit cards. Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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The problems with ending encryption to fight terrorism

Forcing tech firms to create a "backdoor" to access messages would be a gift to cyber-hackers.

The UK has endured its worst terrorist atrocity since 7 July 2005 and the threat level has been raised to "critical" for the first time in a decade. Though election campaigning has been suspended, the debate over potential new powers has already begun.

Today's Sun reports that the Conservatives will seek to force technology companies to hand over encrypted messages to the police and security services. The new Technical Capability Notices were proposed by Amber Rudd following the Westminster terrorist attack and a month-long consultation closed last week. A Tory minister told the Sun: "We will do this as soon as we can after the election, as long as we get back in. The level of threat clearly proves there is no more time to waste now. The social media companies have been laughing in our faces for too long."

Put that way, the plan sounds reasonable (orders would be approved by the home secretary and a senior judge). But there are irrefutable problems. Encryption means tech firms such as WhatsApp and Apple can't simply "hand over" suspect messages - they can't access them at all. The technology is designed precisely so that conversations are genuinely private (unless a suspect's device is obtained or hacked into). Were companies to create an encryption "backdoor", as the government proposes, they would also create new opportunities for criminals and cyberhackers (as in the case of the recent NHS attack).

Ian Levy, the technical director of the National Cyber Security, told the New Statesman's Will Dunn earlier this year: "Nobody in this organisation or our parent organisation will ever ask for a 'back door' in a large-scale encryption system, because it's dumb."

But there is a more profound problem: once created, a technology cannot be uninvented. Should large tech firms end encryption, terrorists will merely turn to other, lesser-known platforms. The only means of barring UK citizens from using the service would be a Chinese-style "great firewall", cutting Britain off from the rest of the internet. In 2015, before entering the cabinet, Brexit Secretary David Davis warned of ending encryption: "Such a move would have had devastating consequences for all financial transactions and online commerce, not to mention the security of all personal data. Its consequences for the City do not bear thinking about."

Labour's manifesto pledged to "provide our security agencies with the resources and the powers they need to protect our country and keep us all safe." But added: "We will also ensure that such powers do not weaken our individual rights or civil liberties". The Liberal Democrats have vowed to "oppose Conservative attempts to undermine encryption."

But with a large Conservative majority inevitable, according to polls, ministers will be confident of winning parliamentary support for the plan. Only a rebellion led by Davis-esque liberals is likely to stop them.

George Eaton is political editor of the New Statesman.

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