Stiglitz: we could shut down tax havens any time

He says:

You ask why, if there’s an important role for a regulated banking system, do you allow a non-regulated banking system to continue? It’s in the interests of some of the moneyed interests to allow this to occur. It’s not an accident; it could have been shut down at any time. If you said the U.S., the UK, the major G-7 banks will not deal with offshore bank centers that don’t comply with G-7 bank regulations, these banks could not exist. They only exist because they can engage in transactions with standard banks.

It's a political malfunction, not an economic inevitability.  It's therefore a feature, not a bug.