Open Source means free right. People like free so why should it be any different for the government. If they can work on linux rather than spending millions on

Open Source means free right. People like free so why should it be any different for the government. If they can work on linux rather than spending millions on window software then that's good right loads of money saved for tax cuts or new jobs or something. I do not quite get it though why do people spend so much time programming excellent software to only then give it away for free