Perhaps, another option would be for the government to help establish a drivers-cooperative app. An app where all the profits collected had to distributed back to the drivers or invested in the common infrastructure to maintain, promote, and improve the app.

The drivers could also agree amongst themselves as to matters such as working conditions and minimum pay.

Uber and others could still exist, but they'd be at a disadvantage because they'd be ploughing billions into nonsense like self-driving blimps or whatever.