From an efficient market standpoint, a good balancing measure would be if consumers knew exactly what it cost Uber/Lyft to provide the service. That way even if they charge you more for being rich, you can make an informed decision whether or not you want them profiting as much as they are from you.

A competitor might even find an advantage by providing that information. For example, if a car service told you exactly how much the driver made and how much the service took as a cut, you might be willing to pay more because you know where the money is going.