The OBR's fiscal outlook in five charts

The OBR looked at fiscal sustainability today. Here's what they found.

Forecasting is hard

Page 106, thanks to Ed Conway

I'll admit, I have an idiosyncratic sense of humour. But still, I laughed out loud at this tangle of lines, which shows the OBR's best attempts to forecast oil and gas revenues. It's reminiscent of the woefully optimistic IMF forecasts for Greek GDP, excel that instead of being consistently wrong in the same direction, it's more like a child just scribbled a lot of lines on the chart.

Unfortunately, the oil and gas revenues remain important. Thanks to the long-standing decline in productivity in the sector, a function of the drying-up of North Sea oil fields, it usually imparts a massive downward pressure on the quarterly GDP figures, which means that getting the predictions accurate is crucial for getting the overall figure accurate.

Migration saves us money

Page 147, thanks to Jonathan Portes

If you care about public sector debt, really the absolute best thing you can do is remove restrictions on migration. Migrants are educated by their home country, and frequently retire there too; in the meantime, they work hard, pay their taxes, and have a lower-than-average crime rate.

The "high migration" scenario is of the average net migration being slightly more than double what the ONS uses as its baseline assumption, with 260,000 people coming in on net compared to 140,000. That's a lot more than normal, but it's not outside the realm of political possibility. Just think what a fully open-borders policy could do for the national accounts…

At the other end, the ONS looks at what "zero net migration" would do. Remember that zero net migration is actually the government's explicit policy, so it's already a bit damning that the ONS instead works on the assumption that they will fail to hit it by 140,000 people. But when we look at the stats, it's clear that we should be glad of that. Zero net migration would push the debt:GDP ratio over 100 per cent by 2050.

Young people and old people cost money

Page 78, thanks to Chris Giles

Again, nothing which will blow your mind: the state spends money educating young people, caring for old people, and providing health services to both, while the people in the middle pay the bills. What's interesting are the two crossover points – roughly 23 and 67 years old – where people go from being, on average, a contributor to a benefactor or vice versa, as well as the curious level of the peak of tax contributions, at just under 50.

You are never going to retire

Page 117

The thick line is the OBR's best guess of what changes to the pension age are going to do to the proportion of people between 65 and 74 working: around a 66 per cent increase, to just over a quarter of those people working by 2045. That already comes after a doubling of the rate in the last twenty years:

We are never ever ever getting time off work.

This is all just guesswork

Page 11

Finally, an important reminder that the long-term projections are as vague as can be. In fact, discussing them in terms of fiscal policy is almost nonsensical. What they are instead is predictions of demographic change mapped on to current policy. So if the nation continues ageing as it looks like it will be, and if we fail to do reform the state pension in that time, then the national debt will start rising on current policies in 2037.

Obviously, it's nonsense to act as though all our policies will be the same in 2017, let alone 20 years after that, but it's the only way talk about the future at all.

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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Lord Empey: Northern Ireland likely to be without government for a year

The former UUP leader says Gerry Adams is now in "complete control" of Sinn Fein and no longer wants to be "trapped" by the Good Friday Agreement

The death of Martin McGuinness has made a devolution settlement in Northern Ireland even more unlikely and has left Gerry Adams in "complete control" of Sinn Fein, the former Ulster Unionist leader Reg Empey has said.

In a wide-ranging interview with the New Statesman on the day of McGuinness’ death, the UUP peer claimed his absence would leave a vacuum that would allow Adams, the Sinn Fein president, to consolidate his hold over the party and dictate the trajectory of the crucial negotiations to come. Sinn Fein have since pulled out of power-sharing talks, leaving Northern Ireland facing the prospect of direct rule from Westminster or a third election in the space of a year. 

Empey, who led the UUP between and 2005 and 2010 and was briefly acting first minister in 2001, went on to suggest that, “as things stand”, Northern Ireland is unlikely to see a return to fully devolved government before the inquiry into the Renewable Heat Incentive scheme is complete -  a process which could take up to a year to complete.

“Adams is now in complete control of Sinn Fein,” he said, adding that it remained unclear whether McGuinness’ successor Michelle O’Neill would be “allowed to plough an independent furrow”. “He has no equal within the organisation. He is in total command of Sinn Fein, and that is the way it is. I think he’s even more powerful today than he was before Martin died – by virtue of there just being nobody there.”

Asked what impact the passing of McGuinness, the former deputy first minister and leader of Sinn Fein in the north, would have on the chances of a devolution settlement, Empey, a member of the UUP’s Good Friday Agreement negotiating delegation, said: “I don’t think it’ll be positive – because, for all his faults, Martin was committed to making the institutions work. I don’t think Gerry Adams is as committed.

Empey added that he believed Adams did not want to work within the constitutional framework of the Good Friday Agreement. In a rebuke to nationalist claims that neither Northern Ireland secretary James Brokenshire nor Theresa May can act as honest or neutral brokers in power-sharing negotiations given their reliance on the DUP’s eight MPs, he said: “They’re not neutral. And they’re not supposed to be neutral.

“I don’t expect a prime minister or a secretary of state to be neutral. Brokenshire isn’t sitting wearing a hat with ostrich feathers – he’s not a governor, he’s a party politician who believes in the union. The language Sinn Fein uses makes it sound like they’re running a UN mandate... Gerry can go and shout at the British government all he likes. He doesn’t want to be trapped in the constitutional framework of the Belfast Agreement. He wants to move the debate outside those parameters, and he sees Brexit as a chance to mobilise opinion in the republic, and to be seen standing up for Irish interests.”

Empey went on to suggest that Adams, who he suggested exerted a “disruptive” influence on power-sharing talks, “might very well say” Sinn Fein were “’[taking a hard line] for Martin’s memory’” and added that he had been “hypocritical” in his approach.

“He’ll use all of that,” he said. “Republicans have always used people’s deaths to move the cause forward. The hunger strikers are the obvious example. They were effectively sacrificed to build up the base and energise people. But he still has to come to terms with the rest of us.”

Empey’s frank assessment of Sinn Fein’s likely approach to negotiations will cast yet more doubt on the prospect that devolved government might be salvaged before Monday’s deadline. Though he admitted Adams had demanded nothing unionists “should die in a ditch for”, he suggested neither party was likely to cede ground. “If Sinn Fein were to back down they would get hammered,” he said. “If Foster backs down the DUP would get hammered. So I think we’ve got ourselves a catch 22: they’ve both painted themselves into their respective corners.”

In addition, Empey accused DUP leader Arlene Foster of squandering the “dream scenario” unionist parties won at last year’s assembly election with a “disastrous” campaign, but added he did not believe she would resign despite repeated Sinn Fein demands for her to do so.

 “It’s very difficult to see how she’s turned that from being at the top of Mount Everest to being under five miles of water – because that’s where she is,” he said. “She no longer controls the institutions. Martin McGuinness effectively wrote her resignation letter for her. And it’s very difficult to see a way forward. The idea that she could stand down as first minister candidate and stay on as party leader is one option. But she could’ve done that for a few weeks before Christmas and we wouldn’t be here! She’s basically taken unionism from the top to the bottom – in less than a year”.

Though Foster has expressed regret over the tone of the DUP’s much-criticised election campaign and has been widely praised for her decision to attend Martin McGuinness’ funeral yesterday, she remains unlikely to step down, despite coded invitations for her to do so from several members of her own party.

The historically poor result for unionism she oversaw has led to calls from leading loyalists for the DUP and UUP – who lost 10 and eight seats respectively – to pursue a merger or electoral alliance, which Empey dismissed outright.

“The idea that you can weld all unionists together into a solid mass under a single leadership – I would struggle to see how that would actually work in practice. Can you cooperate at a certain level? I don’t doubt that that’s possible, especially with seats here. Trying to amalgamate everybody? I remain to be convinced that that should be the case.”

Accusing the DUP of having “led unionism into a valley”, and of “lashing out”, he added: “They’ll never absorb all of our votes. They can try as hard as they like, but they’d end up with fewer than they have now.”

Patrick Maguire writes about politics and is the 2016 winner of the Anthony Howard Award.