Nearly three years after its launch, the official inquiry into the collapse of MG Rover has run up a £100,000 hotel and £30,000 food bill.
And there is no end in sight to the investigation which has so far cost £11 million.
The costs were condemned last night with Conservatives claiming the inspectors appointed by the Government to look into the collapse of the carmaker were "living like kings".
MPs of all parties insisted the inquiry started in June 2005 must publish its findings.
But the Government said there was nothing it could do to speed up findings. Ministers ordered an independent investigation after the carmaker closed with the loss of 6,000 jobs at Longbridge.
Last night the Department for Business, Enterprise and Regulatory Reform (BERR) said it could not order inspectors to end the inquiry because it was independent - as unions and MPs demanded.
Chartered Accountants BDO Stoy Hayward were appointed to head the investigation and have:
* so far spent £11,155,790;
* this includes £95,094 on hotel costs for inspectors in Birmingham;
* and a further £29,279 on subsistence.
The figures were obtained by specialist magazine Accountancy Age in response to a Freedom of Information request.
The spending was condemned by Solihull MP Lorely Burt, Liberal Democrat trade and industry spokeswoman.
She said: "Almost £100,000 was paid in hotel bills and just under £30,000 for meals and other expenses.
"It seems a cruel irony this company were on site living in the lap of luxury when the Rover workers were facing redundancy.
"It feels like the Government has issued a blank cheque. It is high time all those who lost their jobs, their families and the taxpayer got answers."
Northfield MP Richard Burden (Lab), whose constituency includes Longbridge, said: "Ministers faced a difficult situation because everybody said they wanted an independent investigation and it's not independent if ministers tell the inquiry what to do.
"But I think the accountants have had long enough and ought to publish their findings. This has taken longer than the inquiries into the Iraq war."
Conservative shadow Industry Minister Charles Hendry said: "The more we learn about this investigation, the odder it becomes. Whilst undertaking this inquiry into the debacle at Longbridge which saw many people lose their livelihoods, the investigators are living like kings courtesy of the taxpayer.
"It's extraordinary the Secretary of State has not set a ceiling on the budget. John Hutton has got to get a grip and set a date for completion and prevent it becoming another exercise in Government waste."
A BERR spokesman said: "We want an accurate, thorough and fair inspection that provides answers.
"The Department and the inspectors are very conscious of the need to complete the investigation as quickly and thoroughly as possible."
Barrister Guy Newey QC is leading the investigation, and has been instructed to examine what went wrong between Phoenix Venture's acquisition of the car company in 2000 and 2005, when MG Rover was bought by Nanjing Automobile Corporation.
The National Audit Office has estimated efforts to save MG Rover and minimise the effect of its collapse cost the taxpayer £250 million.
Conservatives have also accused the Government of making a mistake by backing the Phoenix Venture bid in 2000.
A report by the Commons Public Accounts Committee in 2006 estimated that the total cost of MG Rover's collapse to taxpayers, creditors and former employees was almost £1 billion.
This included more than £600 million owed to employees and unpaid creditors, and costs of £270 million to the taxpayer.
The Phoenix consortium bought Rover for £10 in 2000.
The cost of Rover, according to the Commons Public Accounts Committee:
* £500 million pension scheme deficit;
* £109 million owed to creditors;
* £90 million from the Treasury to rescue the West Midlands economy;
* £5.2 million DTI loan to Rover unlikely to be repaid.