Make that an electric self driving bus and the wages tend towards zero, being some clean/tidy/check etc. Even that can be reduced since you know each passenger

Make that an electric self driving bus and the wages tend towards zero, being some clean/tidy/check etc. Even that can be reduced since you know each passenger and his payment card ID and if he dropped a wrapper/cup = added fee on the card - this invigilation would coerce people to dispose in the self emptying bin at the depot. Thus a great economy would ensue and would dramatically reduce the costs = lower fees = more users. Bus routes tend to run on good main roads(there are exceptions) and are easier for self drive systems.