I totally agree that urban sprawl sucks, and should be stopped. a much more direct and fair way to do this would be to remove zoning restrictions that only allow building single family homes (instead of any higher-density housing) in most urban parts of north america, and remove minimum parking requirements for businesses – and hope that the cultural shift propagates to other places where these car-dependent designs have taken hold.

secondly, calling people needing transport a "market" seems like part of the same faulty thinking where public services need to turn a profit. taxing the rich could absolutely pay for a lot more public transport: before the Beeching cuts in the 1960s, the UK had around twice as many passenger railway lines – this was also at a time when the top rate of income tax there was 83%, as opposed to 45% now.

lastly, maybe think about who rich people exploited in order to get their (your?) money before proposing policies that explicitly aim to make poor people poorer, while letting the rich continue to live where they (you?) please