> Dismantling off-shore banking is generally a good thing since I'd like the ultra rich to pay tax as that funds services that I use.
There are lots of uses to off-shore banking than tax-evasion. In fact, I don't think it's feasible to use any modern (CRS/FATCA compliant) banking for tax-evasion.
Guess where all these un-banked HNWI are going and who is offering them a gold card to run their businesses from?