Private railway operators in Tokyo aren't subsidized by the state, though I think they get a not-insignificant portion of their income from property rents around stations.
Since this is not the case in NYC and Chicago - private individuals / the city owns the property adjacent to transit, there needs to be some other way to capture that value. Enter a sane, necessary taxation / subsidization mechanism.
* The value is real. Property adjacent to transit was insulated from the 2008 crash: https://usa.streetsblog.org/2013/03/22/study-homes-near-tran...