I can offer some paranoid observations regarding these issues.
First: You have to absolutely believe me when I tell you that any personal financial data isn't personal to the governments of the world. If you're living in 1970, then I applaud you for your psychosis. The three strikes were, in order:
The S&L Fiasco (established accountability and investigatory process)
Federal Banking Law Addendums (established electronic records access of information to/from the IRS [and now via the FBI])
and (drum roll please....)
the USA PATRIOT ACT.
You are completely, utterly and endlessly - phucked.
The sad and emerging reality is that money kept in banks is lovely as long as you don't want people asking you questions about that money. And now effectively, the governments of the world have utmost power to ask and receive answers to those questions. Does it appear any different?
Privacy can be bought. Honestly, the prices fluctuate and you may have to buy from 3rd/4th/5th parties those pieces of the privacy puzzle you desire, but it is possible both in the virtual/electronic realms and in the real/tangible realms. PM me for info on the latter, it's what I do.
I know I sound like a conspiracy theory nut, and I'm sure I'm going to get a whole bunch of "Prove its!". I will not. The news, media and current events should show you the intent of our government and others. I'm just very saddened that it has come down to this, but I'd rather have 100% of the ugly truth than 200% of a pretty lie.