That isn't what most of the proposals or actual laws to "regulate Uber" do.
But let's consider your proposal. The first question to ask about any proposed rule is, what are people going to do in response to it? If you limit how much they can take for providing a matching app, they'll add some other feature to their service and charge for that. Or just break out the existing charge on the customer's statement to list something else they're already providing. Your purpose wasn't to prohibit anyone from offering services other than matching to livery drivers and customers, right?
The next question to ask is, what problem are you trying to solve? Are their margins too high? Uber's net margin for 2024 was ~10%, and that was the first year it was even a positive number.
But let's consider your proposal. The first question to ask about any proposed rule is, what are people going to do in response to it? If you limit how much they can take for providing a matching app, they'll add some other feature to their service and charge for that. Or just break out the existing charge on the customer's statement to list something else they're already providing. Your purpose wasn't to prohibit anyone from offering services other than matching to livery drivers and customers, right?
The next question to ask is, what problem are you trying to solve? Are their margins too high? Uber's net margin for 2024 was ~10%, and that was the first year it was even a positive number.