The relationship of unions/managements is adversarial. It is the nature of the beast.
Unions had there times in the past. Yet a union only benefits a limited number of people in society. Then, the small people not unionised fall behind in the general scheme of things. It creates the have worker class and the have not worker class.
Then there is the raising of the minimun wage. Those at the bottom get immediate relief while those a buck or two higher per hour lose what benefit they have when the prices of goods rise accordingly.
If we go back in history it is the church that is the great equalizer. It is the church where fairness first appears. It is within the church that true justice and freedom come forth. It is when Christian people see evil and pass laws to benefit all that true goodness comes to the lowly and to the exalted.
When a church has to have its pastors unionize to get fair treatment then the church has become a partner with the world and has lost its spiritual connection with their creator.
There are many churches where pastors are abused. Many churches where the flock is abused. The answer is not unionization but repentance and love for each other.
The only thing a union could do for the church is to open a pandora’s box in the midst of the church. It would be far more reaching than wages and benefits for some… it would become a festering sore on the body of Christ.