The action of these suppliers has been criminal.
Amazon’s failure to address it until compelled to do so has been negligent.
But HMRC and the Treasury’s failure to act for so long when this was known has been incomprehensible. Billions of tax revenue has been lost and an untold number of UK based businesses have been harmed.
Tax evasion is not a victimless crime.
It also has benefits.
No, really, Consumers have, by the evasion of these taxes, had cheaper goods. Now, we can insist that this isn’t enough to make up for the other damages. We can, equally, insist that it is. But we do actually have to acknowledge that there’s a good part as well as a bad here.
Britons not paying VAT on imports has made those Britons richer by the amount of VAT they’ve not had to pay. Again, you can think that not worth it but it is still true.