Re: Public Accountability for Public Services
You don't need to go as far as Berlin for that.
There is, for example, the deal between the troubled city of Birmingham's council, and its troubled and now defunct Service Birmingham arrangement with a troubled and not yet defunct outsourcer called Crapita.
2006: contract signed: http://www.capita.com/news/news/2006/birmingham-contract-signed/#
2015: http://www.birminghampost.co.uk/business/business-news/anger-capita-makes-millions-birmingham-9979387 (random choice from many articles on similar themes over many years)
2017: contract to be 'dissolved': http://www.birminghammail.co.uk/news/midlands-news/council-supplier-service-birmingham-wound-13048676
"The controversial Service Birmingham IT company set up by Birmingham City Council and Crapita is set to be wound up three years early in a bid to save £43 million of taxpayers' money.
The joint venture, under which Crapita ran the city's information and communication technology (ICT) systems, council tax collection services and formerly ran its call centre, was set up in 2006.
The contract was condemned as being far too expensive at its peak in 2011, costing the council £120 million a year at a time of cuts. It currently costs £70 million a year. [continues]"