Wait how could Unions help against outsourcing? What do Unions do? Use strikes (withholding labor) to get concessions. What does outsourcing involve? Finding cheaper labor out of the country and laying off or firing existing workforce.

If outsourcing is the threat isn't the potentially outsourced threatening a strike kind of like responding to a mugger by putting a knife to your own throat? Except I think that might be more effective as a threat as it makes the mugger think of you as unstable and irrational.