Why don't the airlines introduce a restricted one way which would be good for the ordinary passenger.
They do and they are called LCCs/LoCos!
Business travellers need flexibility and probably would not make use of such tickets ...
They do but often choose LCCs/LoCos to save money!
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"I tell you, we are here on Earth to fart around, and don't let anybody tell you any different." Kurt Vonnegut, Jr.