Re: FOSS for all...
I think you might entirely misunderstand the problem sadly.
Licensing costs aren't actually that significant a figure in the sort of spending we're talking about. The vast majority of the money goes in all kinds of other ways, with the most expensive being the consultancy style services, implementation, that kind of stuff. Essentially "human" resource (which is also very very expensive and does not achieve the required goals).
I'm working on a project right now where we've been successful in getting the gig, because we can do the same work at the same (arguably better) standard, but for considerably less money, by simply cutting out the processes that just rack up those costs.
Big Corp likes to have lots of meetings, planning charges, pre-work visits, surveys and so on that just push the costs up, but aren't wholly necessary, and in most cases in the private sector would be part of the process. In the Public Sector, paying for things that are really part of the sales process is considered the norm. Then paying for the people who quoted the work to decide if the price they quoted is reasonable by "planning" after agreement, then racking it up with all the things that weren't in the incredibly tightly written specifications that allow zero movement...
...and so on and so forth.
Meanwhile we've agreed a day rate, a scope of works, we've allowed contingency up-front and the project comes in, with a healthy profit margin (because private companies do have to make a profit to exist in the future) but a good level of service and result for the client, and can just get on with it.
The issue isn't the licensing, it's always the incredible markups, the ridiculous processes and the red tape, which takes so long it allows the entire project to be rescoped in the meanwhile. Buying licenses is no big deal at all.
Meanwhile, just saying FOSS is an answer is bonkers. FOSS won't implement itself, won't integrate itself, and won't deal with the training any better than licensed software. And those costs aren't free.