I have the feeling that some big banks most have secretly been backing some altcoin to possibly defeat the bitcoin, they have since realise that bitcoin is bitcoin and ripple is ripple no matter how you try to market XRP, bitcoin remains their king. It's a matter of time before they will realize they have toy with real technology.
No matter what the central bank or the government authorities tried to control bitcoin from its adoption, time will really come that bitcoin and blockchain will have its full usage from the people. With this, transparency is all the matters that will make our world out from corruption and makes it a better place to live in.
We do know all we can see in the blockchain is the record of transactions that have been made but not the details and who those people are. You can search it on the net or anywhere where traces are left but honestly I cant really say in what way would it help corruption but if you are saying it with regards to Blockchain only then I would say it is possible to create a cryptocurrency with this feature but why would those who are corrupt use it then it would comes down how the government would sell it to their citizens.