Agreed, it would be a much higher risk propostion for people in that economic category.
But that begs the question, why is $14/hr cash and $14/hr Stock option such a bad wage? AFAIK, the people making $28/hr have no problem expecting the new hires to live on that wage.
If the UAW is about brotherhood and raising the lot of the entire group then why dont they make this proposal. Remember there are roughly three times the people making the bigger wage than there are at the new hire wage. So assuming a zero sum game for the company, if the larger group were to drop their wage just $2/hr, that would allow the lower wage to be raised to almost $20/hr. A better living wage for all concerned.