Exactly. I have also been advised by a former constituent, who, despite no longer living in the UK, is being pursued by HMRC for thousands of pounds of unpaid tax. Another person was advised that this mechanism truly was lawful and it has come as a huge shock to his financial planning that he is left in this position.
There are reportedly over 1,000 people being pursued for unpaid tax. No one is disputing that people should pay tax that is due. The issue is the way it is being requested. People have been badly advised. They have never been able to check whether anything they were doing was illegal, because they were being advised that it was not illegal at the time. It is a loophole that has now been closed.