Governments and banks want different blockchains. Blockchains that'd make Orwell cry in a corner. Sure we'll get government issues cryptocurrencies: CRYPTOFIAT. All your transactions will be traced, monitored and taxed automatically.
Of course, they'll make exceptions for certain individuals...
Man... That is one dark idea... Hope that it never comes to this. What would we do if things come to this? This is why everybody should abandon Ripple, they are taking banks in to cryptocurrencies and introduing them the blockchain technology. If things will become like this, Ripple will be responsible.