Many evil deeds are committed brazenly and in the open--it's only secrecy that protects the innocent.

What about countries where gay people are imprisoned or executed? How would radical transparency help a gay man who wanted to buy a drink at a gay bar, when he knows that his purchases will be used religious goons to throw him in prison?

What about a sex worker and her clients? How would radically transparent blockchains help them?

Would radical transparency have kept Ross Ulbricht out of jail? Would online drug markets be able to operate at all?

What about a dissident in China, who wants to flee the country, and needs money that can't be blocked by capital controls?

What about donors to Wikileaks? Do we want to give the government a list of names to audit, harass, and otherwise persecute?

I'm all for demanding that governments operate on a radically transparent basis. But I think until we figure out how to keep evil busybodies out of power, there will always be a need by good people for financial privacy.