Obviously the powerful or rich can spy on everybody's finances now, easily, pervasively, and routinely, no matter what we do. So privacy as we have known it is effectively over
I think anonymous currency will eventually lead to the collapse or crippling of the state. People will just hide their money and they'll be unable to finance the bureaucracy/control grid that gives them the power to do things like that. So on one hand, the "global ledger" is a severe globalization and possible enslavement tool, but then anonymous currency counter balances that aspect, or possibly overruns it entirely.
Anonymous currency = Atlas Shrugged