They’re getting the idea from the EUSSR and that entity’s crusade against “tax havens”. The EUSSR equates tax avoidance with tax evasion.
Shoot, even the IRS says in so many words (not that it wouldn’t be so if they didn’t acknowledge it, but if even THEY admit it....) that tax avoidance is perfectly legitimate. I don’t believe that the statement went into detail such as keeping money offshore, but was just a general acknowledgement that you’re not required to ignore the tax laws until they come back and clobber you.