In America sometimes construction of mass transit requires so much money that it is less cost effective in terms of riders served on a per-unit-cost basis than subsidized taxi. A lot of that tax money goes to intermediate consultants who come up with extravagant station designs that seem to value grandeur more than utility. Another large chunk of that tax money goes to union workers when equivalent non-union workers are much cheaper to hire, and when fewer non-union workers are needed to do the same job than union workers. The sheer size of mass transit projects means they become even bigger. I don’t like this but it is what it is.