One old chancery judge said he did not see it as the duty of a citizen to so arrange his affairs that the government needed a shovel to remove his wealth!
What is surprising is that this works. If I 'borrow' money from my (UK) company, I have to pay it back in a year or it gets quite heavily taxed. If I had paid that in to the company, I'd have had to make it a loan, and thus get it out untaxed. But, if I earn money as a self-employed person, I can't simply pay it into the company untaxed. I have to declare the income for tax; what I do with the rest is up to me.
It should be quite easy to stop the scheme, and it's a fair bet that a US citizen could not use such a scheme; they are remorseless in taxing income, (but have a generous approach to relief on some of it). Declare, or confirm, the individual, who generates the income, tax-resident in England, regardless of whether or not uses a company here or 'abroad' to receive it, or indeed creates a company to employ him when he earns it (a management company) and tax him as an individual because he generates it all. The Revenue has a general power to attack schemes which are simply for tax evasion purposes; these company arrangements exist because the individuals are tax-resident here, not, say, in Monaco (or Jersey) and don't want, or can't achieve, residence elsewhere, and for no other reason. Really big earners, like Sir Philip Green, are tax- resident in Monaco and live there, to the extent the Revenue now requires. Any man who can pay his wife a billion is definitely tax- resident elsewhere!