I would suggest the compounding growth of labor laws demanded by progressives themselves make unions less and less relevant as time goes on.
What else is there to do after OSHA, fundamentally?
Besides, if someone doesn't like their workplace, it's been far easier to just leave, in recent years...Not so much in past decades where only a few (if not one) industries provided a majority of jobs in any one town.
- first off, not implying a superior model or generalizing a situation, but food for thought. in denmark where i'm from, there's the situation where we have no minimum wage, rather we have strong unions that negotiate with most industries for an appx de facto minimum wages that makes poverty really difficult. businesses that can avoid unions do, still attract workers, and severely underpay workers with a side dish of horrid conditions. denmark is a unicorn here as to its way of doing things, but point is, well, second off, answering your question wholesale in a list:
- the same generally holds true for different sectors in countries with weaker unions, only much more pronounced. if you work in a sector without the ability to collectively negotiate, chances are you're poverty wagin'
- even sectors that have unions as a legally required option, when unions are weak, businesses will fight tooth and nail to keep unions out, circumventing laws, including spending handsomely to try and cull unions as they are being formed. you may consider why we have a system where businesses find it a reasonable expenditure to just funnel money into stopping unions if they don't have a meaningful function
- i have no clue what kind of sector you're thinking about where any individual has the power and resources to just choose another job willy nilly. what income bracket are you talking about, and how in the world would this be relevant for the kind of workers that are protected by stuff like osha
- you severely overestimate social mobility in those small towns, including the still limited work options in such towns
- even in cities, work you depend on to survive - not general you, personal you - is done by people with little resources to go anywhere else