We can but speculate but I'd read that as wanting to restrict surcharges imposed by apps and, perhaps, improved in-car information on how the meter calculates the maximum fare permitted by law.
We are a very diverse group so it is impossible to pander to every whim of every driver. Most folk are selfish so there will naturally be some disagreement with seeking a "level playing field". Those of us who own our own plates and operate heavily subsidised vehicles obviously have nothing to gain from such a principle but, for me, it is an ideological matter and a principle I wholly support. At the very least the corrupt lottery for WAV grants ought to be replaced with an orderly queue based on years experience driving a taxi within the rental sector.