&gt;There is a difference between something that is legal and something that is illegal but difficult to prove. You seem to be conflating the two issues.<p>Isn&#x27;t that what he said? That many of the schemes are clearly illegal but the authorities just lack the resources to investigate and prosecute them (from what I&#x27;ve heard from people who work at HMRC it&#x27;s not that at lot of them are &quot;difficult to prove&quot;, it&#x27;s more like shooting fish in a barrel and more convictions would be trivially achieved by hiring more staff and the higher ups having the political will to do it). The rest of your post is irrelevant given the above.