It used to be that unions and the big business in town were in bed, and oppressed workers via the backing of government guns. Today, unions and government are in bed, oppressing the workers via the government gun.
Maybe some day, workers will realize their enemy are politicians who'll sell out their freedoms for campaign cash and power. And that today have enshrined in law the fact that unions can forcibly take from employees (if they want to keep their job) whether the employee wants it or not. And that unions will be representing you in your negotiations with your employer regarding your compensation, whether they want it or not.
If it's "upper class" vs. the unions, that upper class would be politicians and union fat cats.