That's the most important question here. I'm sure if you knew, they'd have to kill ya...
They won't catch too many fatcats without wistleblowers giving up data. Everyone important saw this coming and moved a long time ago. I'm sure whoever controlled the data in the hot banks got convinced to alter and wipe their hard drives.
It seems to me that the best international bank would be a “handshake bank”. Here’s how it works.
There are two different companies (’A’ and ‘B’) in two different countries, who deal with each other for normal business purposes. Say they do $10b business with each other, each year, for which each of them makes $1b in profits. And they pay the tax on those profits in their respective countries.
If somebody with $100m wants that money transferred to the second country from the first, he makes a deal for a different part of company ‘A’ to take his $100m, in a ‘bad’ investment, so officially he takes a $100m loss and they are $100m richer.
After taking their cut, they give company ‘B’ a discount worth the rest of that $100m in a future business deal, and discreetly, company ‘B’ holds on to that money which can be redeemed at any time in the second country by the rich guy.
In effect, company ‘B’ is the rich guy’s “handshake banker”.
To start with, the rich guy takes a big deduction for his “loss” on his taxes, and any time he can travel to the second country to pick up his money there, without country A’s tax authorities knowing about it.
Company ‘A’ makes a profit, and company ‘B’ saves money. A win-win-win for everyone but the tax man.