Unions are against globalization. To listen to them, unions are a force for good for all workers (rather than just the workers who pay the union its dues). But to watch them, you can see that they're in favor of cartelization. They don't mind other people competing against them, as long as those people are hobbled by the same pay rate, protections, and benefits as the union members have. In other words, they're not allowed to use a lower cost of living, or a lower regard for their own safety, or a longer work week as a competitive advantage.
Sigh. Unions! Still selfish, after all these years.