It's a good thing you supported that with facts.
Poor corporations, I'm sure they are really being held "hostage" when its employees ask for such frivilous things such as health care or wages which justify the hard work, and often humiliating jobs they perform. Unions help to balance the field between financially sophisticated executives and often-times less sophisticated laborers when it comes to negotiating fair working conditions.
There is nothing utopian about the way I described unions. Of course they are not all run that way, but I never said that they did. To claim that none of them help to secure jobs, wages, and working conditions is completely false. Unfortunately, in order to protect all workers, inevitably, some under-performing workers will take advantage of the system. I believe the benefits of protecting the hard-working employees clearly outweigh the disadvantages which arise from a handful of bad eggs.
To be fair, I don't know the economic facts and realities which face the CMs and the Disney Company. However, I cannot come up with one good reason, why CMs, through their exclusive bargaining representative, chosen by the majority of the bargaining unit (which is a guaranteed right under the national labor relations act), should not be allowed to propose and negotiate a higher salary.
If CMs want higher wages, and Disney does not want to grant them, CMs can strike, and Disney is free to hire replacement workers. That is not holding the company hostage.