And this is why the system really should be reverse. The riders provide all details and then drivers provide the price. Forming binding contract on both sides for agreed upon price. And there should be absolute no limit on the price. Be it 1 dollar or 1 million. And the company offering this should take action to enforce any contract in court.
In a pure market system, sure. I’m about as free market as they come, but the intention here is not just to maximize GDP. A functioning transit system with known costs makes a city more livable. That’s a sustainability issue for the city as a whole.