Little story for Dane. Years ago in our nice little town we had a beef packing plant. Union it was!!!. Jobs paid decent around $14.00 to $18.00 per hour. Now that was in the late 70's. Guess what Dane. Management brought up a bunch of "slime ball illegal immigrants" and used them to break the union. Wages went down to $8.00 to $10.00 per hr. Locals picked up the medical expenses and the food stamps for this labor force. Schools system hired additional teachers for each course of study to teach in "spanish". Nice old neighborhoods in the town went to "shit" and are now trash heaps. Ask the people in Greeley CO. how much their property values have gone up since the massive influx of illegal immigration mainly from Mexico happened. They have watched the value of their homes go down 20-30 percent.They are still selling just to get the hell out of there before the whole town becomes a slum.
In 1985 my father was a carpenter and made $15 an hour. This was about the time you saw a lot of illegals flood the job market in the building trades. A good carpenter now makes $15 an hour. The cost of illegals.
Uh my speculation is that the union was broken because the "illegals" didn't demand their every 5 minute on the hour coffee break or they didn't protest it was against union rules to plug in something and didn't need to look at the rule book or get the union steward to approve.