"Shlter Offshore" - unsurprisingly - says it is, but the telling line is:
The truth of the matter, according to some financial experts such as Ronnie Ludwig, partner in the private wealth group at Saffery Champness, is that HMRC is stretched to the limit in terms of staffing and resources, and just cannot chase up those with unpaid tax.
I know that's true.
So for heaven's sake stop the staff cuts HMRC.
Spend more on tax collection now! PLEASE!