I always felt that $70 was an absurd price for the $10 worth of gas and 30 minutes to get home from the airport that taxis used to charge before Uber. I believe

I always felt that $70 was an absurd price for the $10 worth of gas and 30 minutes to get home from the airport that taxis used to charge before Uber. I believe that Uber creates a more efficient allocation of drivers permitting drivers to make more transactions in a work day. Why should I be concerned that the taxi driver is making too little money when he wasn't concerned about charging me too much money before? We are both engaging in the transaction consensually and we are both able minded adults - why shouldn't that be the end of it as far as ethics go?