Earlier quoted context omitted.
What is the primary difference between EU and US style unions?
US unions are usually per company and forces everyone working in a specific area in that company to join or quit, meaning that anyone performing a specific job function needs to join said union. This leads to the "You can't plug a computer into a socket if you aren't in the electrician union" problem, the reason they say that is they think the company could oust the union by hiring people to do that work without prop…
And indeed, the force people to join bit was outlawed in EU in 2006, but it was never particularly popular outside UK anyway.