For wide adoption there needs to be a full market around electric vehicles: opportunities to build charging stations, sell home charging equipment and so on. Gas stations are possible since practically all cars use the same fuel, but also because they have very similar intake openings so that the pump can stop by itself.
Tesla by itself is too small to set standards, so this is good news. It also shows how disclaim in patents helps: the benefit from a greater and more active market exceeds the payoffs from discouraging competition.
Taxpayers should not be paying for someone's pet cause
... Proper action would be to mandate the government to use the best software for the task at hand ... Let the technical merits decide.
I'm sorry, but while technical merits should be paramount, they are not the only consideration. Public contracting is not an exact science, and it is entirely appropriate to have non-technical considerations tip the scales in close cases. So while Free Software should not be mandatory, legislating a preference for it makes perfect sense.
Furthermore, there are considerations beyond the needs of a specific project and tender. Free Software has an externality: when the government (as a customer) requests modifications and improvements (and pays for them to be created), everyone benefits. For example, when my university has Blackboard Inc fix a bug (or improve the software) only Blackboard captures the value (when they sell their software to the next customre). If we were using Moodle, every other Moodle user would automatically benefit. Had we opted for Moodle, we'd also benefit from fixes made by other universities.