In some countries it goes even further. There's a thing called sympathy strikes where workers in the same "federation" of unions join in. So if you as an employ

In some countries it goes even further. There's a thing called sympathy strikes where workers in the same "federation" of unions join in. So if you as an employer screw over your employees, your business will come to a halt. Everybody working within that same "federation" will refuse to service you. So no mail, no trash pickup, no goods delivered, no maintenance work etc. You are essentially shut down until you play ball.