Under a proposed new visa category, a potential immigrant would submit a business plan to be evaluated by the Small Business Administration and upon judging the ability of the business to employ three or more U.S. workers (non-relatives) the individual would receive conditional permanent residence.

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"Once you submit your papers and passport, along with the visa fee - which is by the way non-refundable and ridiculously priced - there's normally a 15-working day period after which you are called back to pick up your passport and your visa which you may or may not get, " he said.

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Mr Raab, formerly a lawyer at the Foreign Office, suggests that any member of the public should be able to submit evidence of wrongdoing to the Crown Prosecution Service, which would, if persuaded, then recommend a visa ban or asset freeze.

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