If Cameron wants to reduce debt, he needs more immigrants

A high level of immigration helps to reduce government borrowing, says the OBR.

If David Cameron really wants to pay off "the nation's credit card", he might want to adopt a less restrictive immigration policy. One of the headline findings of today's Office for Budget Responsibility Fiscal sustainability report is that a high level of net migration helps to reduce government borrowing. It notes:

Higher net inward migration than in our central projection – closer to the levels we have seen in recent years, for example – would put downward pressure on borrowing and PSND, as net immigrants are more likely to be of working age than old age than the population in general.

As the graph above shows, while zero net migration would see the national debt rise to more than 160% of GDP by 2060-61, a policy of high migration would see it increase to little more than 40%. Yet Cameron, who has described deficit reduction as the "guiding task" of the coalition, seems determined to impose even more restrictions on immigration, recently suggesting that the UK could block Greek migrants from entering the country if Greece leaves the euro. Reducing net migration "from hundreds of thousands to tens of thousands", as Cameron aims to do, would significantly weaken the economy. But the PM, never one for detail, is unlikely to be swayed by the OBR.

David Cameron talks to UK border agency officials in their control room during a visit to Heathrow terminal 5. Photograph: Getty Images.

George Eaton is political editor of the New Statesman.

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#Match4Lara: Lara has found her match, but the search for mixed-race donors isn't over

A UK blood cancer charity has seen an "unprecedented spike" in donors from mixed race and ethnic minority backgrounds since the campaign started. 

Lara Casalotti, the 24-year-old known round the world for her family's race to find her a stem cell donor, has found her match. As long as all goes ahead as planned, she will undergo a transplant in March.

Casalotti was diagnosed with acute myeloid leukaemia in December, and doctors predicted that she would need a stem cell transplant by April. As I wrote a few weeks ago, her Thai-Italian heritage was a stumbling block, both thanks to biology (successful donors tend to fit your racial profile), and the fact that mixed-race people only make up around 3 per cent of international stem cell registries. The number of non-mixed minorities is also relatively low. 

That's why Casalotti's family launched a high profile campaign in the US, Thailand, Italy and the US to encourage more people - especially those from mixed or minority backgrounds - to register. It worked: the family estimates that upwards of 20,000 people have signed up through the campaign in less than a month.

Anthony Nolan, the blood cancer charity, also reported an "unprecedented spike" of donors from black, Asian, ethcnic minority or mixed race backgrounds. At certain points in the campaign over half of those signing up were from these groups, the highest proportion ever seen by the charity. 

Interestingly, it's not particularly likely that the campaign found Casalotti her match. Patient confidentiality regulations protect the nationality and identity of the donor, but Emily Rosselli from Anthony Nolan tells me that most patients don't find their donors through individual campaigns: 

 It’s usually unlikely that an individual finds their own match through their own campaign purely because there are tens of thousands of tissue types out there and hundreds of people around the world joining donor registers every day (which currently stand at 26 million).

Though we can't know for sure, it's more likely that Casalotti's campaign will help scores of people from these backgrounds in future, as it has (and may continue to) increased donations from much-needed groups. To that end, the Match4Lara campaign is continuing: the family has said that drives and events over the next few weeks will go ahead. 

You can sign up to the registry in your country via the Match4Lara website here.

Barbara Speed is a technology and digital culture writer at the New Statesman and a staff writer at CityMetric.