If that's the case then why aren't there private investors able to do this?
We know that there are literally trillions of dollars of infrastructure investments that slosh around world markets all the time, people using their own money, pension funds, private equity firms, investment banks—that's what they do for a living. Why wouldn't they invest in this if, as you say, the minimum return we should expect is 2% and returns could be much higher than that on an annual basis?