Earlier quoted context omitted.
I would set up the situation more like the state passing a law saying that an agency, call it the Battery Protection Agency (BPA), can decide what constitutes battery. Then the BPA decides in 2015 that verbal abuse and insults constitutes battery, and prosecutors proceed to arrest people for insults going back 5 years before the BPA's 2015 decision. The parallels to the IRS case should be obvious, and the above hypot…
> The parallels to the IRS case should be obvious Please point the specific provision(s) of law parallel to the one in your hypothetical, both as to the unlimited discretion and as to the discretion to decide what constitutes criminal punishment. Because I don't think the parallels are at all obvious.
I never said the discretion was unlimited; rather, I think that any retroactive decision in guidance/policy/interpretation is prohibited by the constitution. The words are just semantics.
IRS tax avoidance constitutes criminal punishment.
Thanks for the downvotes, everyone.