Here is a strange paradox. The government has imposed a tough and to many people unfair benefits and tax credits regime which has squeezed the poorest – both the unemployed and those in work.

Yet this summer accountants have revealed that HM Revenue and Customs and the Department for Work and Pensions has paid out £5 billion to people on benefits and low incomes who should not have received it. And they predict that even more will receive this payments next year. I have written about it in Tribune.

The disclosure comes in the annual audit of both departments by Parliament’s financial watchdog, the National Audit Office, who have qualified the accounts of both departments – as not being a true and accurate description of public spending.

According to the NAO report: “HMRC estimates that the overall level of error and fraud that resulted in overpayments in Tax Credits in 2015-16 increased to 5.5% of Tax Credits expenditure (from 4.8% in 2014-15)

“HMRC estimates that the overall level of error and fraud resulting in underpayments in Tax Credits in 2015-16 remained at 0.7% of Tax Credits expenditure (0.7% in 2014-15). This equates to overpayments of £1.57 billion and underpayments of £210 million.

“HMRC has told us that it believes the level of error and fraud in Tax Credits will increase further when measured for 2016-17. Two main factors have been identified that will lead to this increase: the introduction of the ‘Commercial with a view to a profit’ self-employment test for those who are self-employed and the impact of the Concentrix contract. The impact of these factors on error and fraud levels will not be measured until June 2018, and so the estimate of error and fraud in 2015-16 remains the most up-to-date indication available of error and fraud in Tax Credits expenditure for 2016-17.”

Concentrix were sacked by the department after a privatisation programme went wrong – and they were not up to the job.

Worse are the figures for DWP.

The NAO’s findings are: “Excluding State Pension, overpayments are at the highest levels since 2009-10, while underpayments are at the highest recorded levels.”

Overpayments amount to £3.4bn, excluding the state pension, an increase of £400 million while underpayments are £1.5bn In percentage terms this amount to an increase to 4.1 per cent of all overpayments and 1.9 per cent of all underpayments.

The report says: “Amongst benefits measured annually for fraud and error, Employment Support Allowance and Housing Benefit overpayments are at the highest recorded levels, and Jobseeker’s Allowance overpayments have returned to the highest levels since 2010-11.

The NAO questions some of the techniques used by the DWP to calculate fraud – saying it assumes that when people don’t get back to the department for a re-assessment that they have been fraudulently claiming. This may not be the case. Also, information is out of date.

“The absence of up-to-date information on error rates in large benefit streams creates a risk that the department is not targeting its fraud and error interventions effectively,” the report says. “For example, Disability Living Allowance, which accounted for £11.5 billion of expenditure in 2016-17, has not been measured for fraud and error since 2004-05.”

All this points to some serious mismanagement by the ministries – which have been squeezed by successive coalition and Tory governments. But it doesn’t mean that those at the top have suffered. I shall return to some interesting findings in their annual reports.