Good questions. I unfortunately can't help with any insight.
But my personal policy is to only take jobs that I could walk away from and quit the moment anything I'd want union support for comes up. A union for international employees seems next to impossible, especially with the employer of record thing getting in the way.
Luckily the market for my skills is such that I can afford that policy. You should probably only consider international employment relationships if you are going to be paid a butt load of money and can find a replacement job very easily.
But my personal policy is to only take jobs that I could walk away from and quit the moment anything I'd want union support for comes up. A union for international employees seems next to impossible, especially with the employer of record thing getting in the way.
Luckily the market for my skills is such that I can afford that policy. You should probably only consider international employment relationships if you are going to be paid a butt load of money and can find a replacement job very easily.