I think a lot of union members need to "do their history" too. In the late 1800s/ early 1900s, the workers role in the factory was indeed quite abysmal. Child labor, "slave wages" (that actually doesn't make sense - slaves don't HAVE wages) no benefits, dangerous working conditions, on, and on. The union "idea" (with a good deal of pushing by a popular author, Karl Marx) caught on, and quite literally saved the lives of a lot of American (and other countries') workers.
But 2008 is not 1908. The tables have turned, and the unions wield the power to destroy. Their essential "weapon", the strike, is effective because it can damage or destroy a company if they don't give in. But it is a REAL weapon of mass destruction. They can do a lot more damage to themselves, if they employ it to agressively.
Fighting for the wages (desired) today, is not the same as fighting for the ability to survive in the past. For all those decades of unions demanding (and getting) more more more, there does certainly come a time when you've got to expect the pendulum to swing to less less less sometime. The US automakers were on top, and growing tremendously in those "more" days, but they are not ascending any more. If anything they are going downward, with a very good chance of even less.
Unions can still do a very important function in today's society, but the time for militancy is well past. And we do have the unions to thank for it being past. It would be best (for their members, if not for the leaders) to spend less time fighting their employers, and more time helping them.