It also shows a lack of imagination. If you have to provide a union with a job bank, why not re-deploy employees to other roles? With one person per train, re-deploy people to run more trains therefore decreasing the interval between trains. Stations used to have medics but this was cut. How about re-train people to be those medics? The subway could use a signaling upgrade and positive train control. Installing platform screen doors to greatly reduce the incidence of people falling onto the tracks is going to need a lot of labor.