I can't understand why they had this assumption that it will create a monopoly? At very least they could create a new state body in charge of the network and th

I can't understand why they had this assumption that it will create a monopoly? At very least they could create a new state body in charge of the network and then lease parts to different companies. Kind of similar fashion how National Rail works, but being able to enable true competition as multiple companies could lease the same routes to customers.