> Public transportation must be built by the local government,

Amtrak is public transportation. Airlines are pretty close to public transportation. Local government doesn't need to be involved.

To my knowledge there are only a handful of public transit systems in the world that operate at a profit, let alone that operate at enough of a profit to recover construction costs. As in, maybe 5 if you squint really hard. Who do you expect to fund new ones if not the government?