AO.com founder John Roberts has demanded Sir Keir Starmer step down as Prime Minister as the billionaire businessman launched a blistering attack on Labour's approach to the economy and enterprise.
The 52-year-old entrepreneur said Britain was "broken" and accused Labour of failing to create the conditions needed for businesses to grow and invest.
Mr Roberts, whose online retail company generates more than £1.1billion in annual revenues, made the comments during an interview with The Sun.
The businessman, who launched AO.com following a £1 bet in a Bolton pub, said Britain risked falling further behind unless ministers adopted a more pro-business approach.
His message to the Government was clear: "back business, or watch Britain fall further behind".
Mr Roberts also revealed he shares some common ground with Nigel Farage's Reform UK party as frustration grows among business leaders over taxation and regulation.
The entrepreneur argued that profit should not be treated negatively, insisting successful businesses are responsible for creating jobs, driving investment and supporting public services through taxation.
Mr Roberts wrote: "Without profit, businesses cannot invest, hire more people or take the risks that grow the economy."
AO.com founder John Roberts tells Keir Starmer to quit as he says Britain is broken | AO.com Linkedin He added that refusing to support enterprise meant abandoning economic growth altogether.
The AO.com founder also criticised what he described as Labour's failure to introduce policies capable of generating wealth across the economy.
Mr Roberts recalled a conversation with a senior Labour MP in which he asked the politician to identify a Government policy that had genuinely created wealth.
"He could not name one," Mr Roberts said.
The businessman pointed to rising bureaucracy, housing shortages, increasing NHS waiting lists and welfare spending as evidence that Britain was moving in the wrong direction.
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Mr Roberts criticised the practice of shutting down wind farms during periods of surplus generation
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Mr Roberts also outlined a series of policy proposals he believes would improve economic growth and encourage greater investment across the country.
Among his suggestions was scrapping the recent increase in employer National Insurance contributions in order to help businesses recruit more workers, particularly younger employees entering the labour market for the first time.
The entrepreneur also proposed replacing the current inheritance tax system with a flat 10 per cent rate.
On healthcare, Mr Roberts suggested introducing a system allowing patients to book face-to-face GP appointments online within 15 minutes.
He also proposed a £15 charge for appointments in an effort to discourage missed bookings and reduce pressure on surgeries and accident and emergency departments.
Energy policy also featured heavily in his proposals, with the businessman calling for greater domestic energy production through North Sea drilling projects.
Mr Roberts criticised the practice of shutting down wind farms during periods of surplus generation, describing the situation as "madness".
He wrote: "When there is surplus power, we should use it to cut bills."
The AO.com founder also called for VAT to be removed from independent school fees, arguing private schools already help reduce pressure on the state education system.
Mr Roberts also revealed he shares some common ground with Nigel Farage's Reform UK party
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Mr Roberts suggested more children in care should be given access to private education where appropriate.
On housing policy, he advocated restoring the Help to Buy scheme while increasing grants for affordable and social housing developments.
The businessman also called for more planning officers to be recruited in order to accelerate housebuilding decisions.
Mr Roberts further argued the welfare system should function as a safety net rather than becoming a long-term solution for those out of work.
He also backed restoring the two-child benefit cap.
Mr Roberts said: "It is not the responsibility of hard-working people to foot the bill for those who choose not to work."
The entrepreneur said Britain required political leadership prepared to reward success, encourage investment and support businesses capable of creating jobs and economic growth.