In this case, nobody was going to build EV chargers if there were no EVs on the road and nobody would buy an EV if there were no chargers on the road. Stepping in and giving the initial incentive to break that cycle is what this type of intervention, such as subsidies, does.
And why do Australians think governments should fund the building and upkeep of federal highways? Why can't we leave that up to private enterprise?
Surely the best option is to make sure every public road is a toll road. That Liberal Party approach to road building has worked great in NSW.
Toll Holdings is now one of the most profitable companies in the world, thanks to a Liberal NSW government turning every major NSW 'public' road into a Toll Holding toll road.
That's how good government works, making sure the public pay tooth and nail for a 'public' road as that helps out the donors and the shareholders.