This strikes me as really only possible once. The main group of people that this is aimed at, holders of large amounts of cash, are unlikely to start accruing t

This strikes me as really only possible once. The main group of people that this is aimed at, holders of large amounts of cash, are unlikely to start accruing their future funds in 500 and 2000R notes and leave themselves open to this sort of action in the future. It would make sense to diversify it into Euro's, Dollars(USD or AUD), GBP or even gold or bitcoin to prevent a reocurrence. Im not saying that they should evade taxes just that if they are going to they can protect themselves against this happening again.