The price increase required by the higher quality of software is roughly a fixed factor. The benefits that come from code reuse are exponential. If a governmen

The price increase required by the higher quality of software is roughly a fixed factor. The benefits that come from code reuse are exponential. If a government can't afford to release the sources in public right away, a gradual transition is possible: vendors that offer open source software have their prices multiplied by 0.1 during bidding. And this factor of preference for open source can be increased or decreased state-wide depending on the budget.