I guess it is coincidence, but I spent explaining my point of view why open source should be a base platform for any public organization funding with tax money

I guess it is coincidence, but I spent explaining my point of view why open source should be a base platform for any public organization funding with tax money to a few of my friends last week, where each was complaining about office suite/mail/desktop/etc differences from windows-based analogs. My major practical benefit from switch to open source by as large organization as city government is the fact that these money will go to local support organizations and results of their work will be owned by whole city. I.e. if taxpayers paid for this software patches, updates, etc it make sense to own this work at very least.