New research from nef (the new economics foundation), published on the day that the Paris club - the informal group of the world's creditor countries - meet to celebrate 50 years of rescheduling the debts of the world's poorest, shows that if the world's richest countries honoured their aid commitments for just five years, all unsustainable debt of the poorest could be written off to such a degree that the basic health and education needs of the world's poorest people could be met.