It would seem that tracking taxpayers money could be a great use-case for Bitcoin and the blockchain! 
[1] http://www.nytimes.com/2016/01/05/technology/gm-invests-in-lyft.html
[2] http://www.reuters.com/article/us-autos-gm-treasury-idUSBREA3T0MR20140430
[1] http://www.nytimes.com/2016/01/05/technology/gm-invests-in-lyft.html
[2] http://www.reuters.com/article/us-autos-gm-treasury-idUSBREA3T0MR20140430