No mass transit system makes a profit, at least the last time I talked to someone who was heavily involved in the numbers. They require a subsidy of, what was it, 70%? That doesn’t make it wrong, but it has to be considered.
Pretty sure there are others that run successfully.
BTW only road systems where you pay for every mile you drive (see e.g. motorways in France, Spain, Italy) turn a profit. All others are, basically, just a waste of taxpayers money ;-)
It's usually failed policies and nincompompous administration that make public transport systems fail.
Sources: >https://translate.google.de/translate?sl=auto&tl=en&js=y&pre... >https://www.swm.de/dam/swm/dokumente/unternehmen/swm/geschae...
http://money.cnn.com/2015/03/30/news/hong-kong-mtr-subway-pr...