I'm currently a union member(not with the auto workers).It's a dicey call when to go on strike and when not to.Nobody wins in the short term during a strike,it's the long run you have to look at.That old saying "short term pain for long term gain" says it all.My biggest concern has always been "will costs get to high and the company will just move,close or go bankrupt.Each side has a responsibility to make sure this doesn't happen.When I receive the final offer to vote on I don't care what the negotiating committee recommends.I say to myself" can I live with this offer for the next 3-5 years,or whatever the contract length is".
Ultimately, it's the union memberships decision.