Willem Buiter, writing on his FT blog, has laid out what he sees as the principles for financial regulation in future. He really does a thorough job, and it is worth reading in its entirety.
It's a bit Year Zero in approach, so the dithering fools that we seem to have allowed to become our leaders will not do it, but he nails the right issues, and has some damn good suggestions.
He also understands, as many do, that times of crisis can be the time to implement important changes.
"It is necessary, for political economy reasons, to rush new comprehensive regulation of the financial sector. While it would be better, holding constant the likelihood of the measures being adopted and implemented, not to act in haste, there is now a unique window of opportunity - a period of extraordinary politics, in the words of Balcerowicz - to actually get the thorough regulatory reform we need."