From www.accountingweb.co.uk: (UK context) HMRC challenges the notion that all tax avoidance is legal, pointing out that many avoidance schemes are classified as abusive or illegal by courts.

The distinction between tax avoidance and evasion often blurs, with some schemes resulting in severe penalties, tax owed, and reputational damage for clients.

There is a call for a crackdown on the tax avoidance industry to increase transparency, improve tax revenues, and protect individuals from harmful financial schemes.