I think it just have something to do with how in the US, unions are regulated to be powerless at best, infringe on class warfare at worst. You can't have an un

I think it just have something to do with how in the US, unions are regulated to be powerless at best, infringe on class warfare at worst. You can't have an union that span over multiple industries, thus unions will only fight for a single group on workers, sometimes against other workers. It makes it impossible to advocate for global labor rights. PTO is an old example, but for a more recent one, if an employer forced me to be available outside of my 40 weekly hours without comp, that would be illegal. I don't have to negociate for it. It's automatic. If your employer control your time, he has to pay you.