If you have plenty of money, you can pay to have it protected - it's that simple and has been for as long as I can remember. It's only working folk that pay their way, the rest get away with everything they legally can. PAYE is a way the government can control (and tax) everything you earn. But the rich don't earn anything, they (or more correctly, their companies) make profits that are squirrelled away to be drawn on out of the reach of the tax man.
Heads won't roll provided no one has broken the law. And you'll find all those in those positions will have been very well advised and I suspect, walk away unharmed.
Is it morally right? No; but I suspect it won't change in my lifetime.
So far as I am aware nothing illegal has been uncovered, so what's the problem apart from the incompetence of governments in allowing it and the usual communist claptrap about taxing the rich to give to the poor?
And are we all sure that none of our pension funds are in offshore accounts?