[spijdar]

I imagine even with legal support, many industries could work around them anyway. Except for jobs that rely on local workers, I can't help but think that the long term reaction to unionization in, say, the tech world, would involve (more) jobs being outsourced to other countries.

Sure, you could try to outlaw that, but these regulations always seem to have loopholes. You'd need unions with basically no borders stretching across continents, which I frankly find terrifying.