Interesting choices.....

Cross the line to work but be called a "scab"

Don't cross the line, lose the house, blame someone else for your problems, but at least you're part of a "union"

Sounds like high school to me. The union and the mechanics that back them can go screw themselves. If the mechanics are as great as they say they are, they can find a job anywhere and be paid just as much, they don't need some "representative" to find the job for them.