I've been a proponent of blockchain money for this very reason. In a perfect world (well, less imperfect world where government exists but it is actually accountable to the proletariat), all government purchases and transfers would HAVE to be made via the blockchain for the precise reason that then everyone knows where the money goes. I wholeheartedly agree that there does not exist any government that would submit to such scrutiny. Doesn't mean that they won't force it on the proles though.