It's a very sweet deal for the unions and for large employers. The unions make sure to collectively "bargain" each year for extremely low pay raises and even for nominal pay cuts for their members. In exchange the large employers force every employee to sign up for union membership. Sometimes the company itself signs the employee to the union, without any consent from the individual.
In exchange the unions get to collect their fees on the salaries of their members, which is used for political influence and funneled to political parties.
In exchange the unions get to collect their fees on the salaries of their members, which is used for political influence and funneled to political parties.