The biggest benefit of union strikes is that they let workers protest actions they think are unfair on the part of their employer without having to worry about getting fired or punished. One bad thing about strikes is that they can hurt a company’s finances because no work is done during the strike.
Labor strikes can help a union negotiate a new contract or better working conditions for the workers it represents. Workers who speak out against bad working conditions can’t be treated unfairly if they go on strike to protect themselves.
On the other hand, says How Stuff Works, labour strikes can hurt a lot more than just the company involved. For example, the 2005 New York City transit strike shut down one of the largest transit systems in the world for two days. This made it hard for millions of people to get around the city.