Firing the transit workers and breaking the union would be glorious, but short of that the damage they are doing to themselves and their cause may ultimately bring about the union's demise in any case.
This is a union that cannot seem to recognize when it is winning a negotiation: the MTA backed off its demands to raise the retirement age for new workers to 62, from 55. That was a huge victory for the union. The MTA backed off its (pathetically modest) demand that workers contribute a whopping one percent of their earnings to help pay for health care benefits, instead of the current big fat zero. That was a huge victory for the union. The MTA agreed to a 10.5% salary increase phased in over three years, at annual rates of 3, 3.5 and 4 percent, something a lot of private sector workers would be very happy to be promised (if it weren't for the minor fact that you can't make promises like that in the private sector, because you might not be able to pay for them). THAT was a huge victory for the union. So why did they walk?