This reminds me of the 'bottom of the harbour' tax scheme from the 70's in Australia (though that was properly criminal).

Something I liked about how they dealt with it was they changed the law retrospectively meaning companies/individuals had to pay back tax they had avoided from previous years. I would love to see this done more where there is blatant tax avoidance.

http://en.wikipedia.org/wiki/Bottom_of_the_harbour_tax_avoid...