That has already happened. Do you know the percent of the PRIVATE sector workforce that is unionized? I'll answer for you, it is less than 6%. So there is a 94% chance that the jobs outsourced were NON-UNION.
The post I was referring to cited the steel industry in particular. This industry is highly unionized.
Please don't tell me that unions have not contributed to the decline of industry in North America. I have been observing the machinations of the UAW/CAW, teacher's unions et. al. for my entire life. The decline of the "big 3" auto makers is due to the rapacious demands of the UAW/CAW and a short sighted management that gave in to these demands. Many other industries looked at this example and responded by setting up shop in China.