Something that you dont seem to understand is that companies can run at a loss and at the point of that loss getting too large, then cutting costs can be the only choice left to them. Joining up to a union in that isntance doesnt make a jot of difference.
The Honda case I cited earlier, the Unite union advised workers to actually take the pay cut. I know your head in the clouds attitude doesnt want to compute that in the real world things like pay cut or lose jobs are the only options left to a company.
http://news.bbc.co.uk/1/hi/8063719.stm