Most of your points I'm ignoring, but just pointing out the part that seems most obvious to me...

If a large team of expert lawyers and accountants comes up with a plan of action, the odds of it being illegal are tiny. It isn't a fair process, unbiased or transparent. But it doesn't make much sense to expect that billionaires would be jailed for tax fraud. They've got more money than they can spend, why risk going to jail at all. They might do that, but it isn't a rational thing to do.

Sure it can happen, but there needs to be actual evidence before anyone should assume it is widespread.