That works in theory. In actuality the system is already overfunded compared to other cities and funds simply become fodder for well-connected contractors on large capital projects or union workers.

https://www.nytimes.com/2017/11/18/nyregion/new-york-subway-...

Here is an excerpt from the article: "Subway workers, including managers and administrative personnel, now make an average of about $155,000 annually in salary, overtime and benefits, according to a Times analysis of data compiled by the federal Department of Transportation. That is far more than in any other American transit system; the average in cities like Boston, Chicago, Los Angeles and Washington is less than $100,000 in total compensation annually."