To clarify a technicality, closed shops are illegal (hiring o ly those already in the union), and union shops (where you must join upon hiring) are legal.
It isn't businesses that want it, but unions demand it as a power move- power against the workers. By being forced into a particular union, workers lose their recourse against unions that behave badly.
For one thing, it undermines their ability to screw over new hires at the benefit of those with seniority, and allows them more wiggle room in wasting the money they collect in dues on things like retreats to remote islands.
There are a few instances of places throwing off bad unions, but it is a long process, unions will fight back in courts, and you have to be prepared for retribution from your coworkers who disagree.
Having union membership in any way tied to your employer is nothing but a way to abuse you, the worker.
It isn't businesses that want it, but unions demand it as a power move- power against the workers. By being forced into a particular union, workers lose their recourse against unions that behave badly.
For one thing, it undermines their ability to screw over new hires at the benefit of those with seniority, and allows them more wiggle room in wasting the money they collect in dues on things like retreats to remote islands.
There are a few instances of places throwing off bad unions, but it is a long process, unions will fight back in courts, and you have to be prepared for retribution from your coworkers who disagree.
Having union membership in any way tied to your employer is nothing but a way to abuse you, the worker.