[phpisthebest]

>>The tech is then, in practice, given to the private sector.

100% false, normally the people that created the tech while in university are the ones that create the business using the test (see facebook, google, etc), it is their tech to begin with it was not given to them

In most cases the University is also either paid a fee, or is part owner in the company as a startup, cashing out when funding starts.

Nothing is "given away"

now I personally think anything developed using Government Grants should be Public domain, non-patentable, non-copyright, 100% public domain, but ....

[ants_everywhere]

The technologies I mentioned were all developed by dozens or hundreds of people over the course of decades. Statistically, P(you become a founder | you helped invent the tech) is basically 0. Although you are probably right that P(you helped invent the tech | you are a founder) may be nonzero.