it is generally reported that average annual income in right to work states, the ones in which Republican business owners bribe Republican Politicians to fight unionization tooth and nail, are approximately $1,500 per year. That is to say that the average annual earrings per worker in states that Do Not Have "Right-to-work" laws is $1,500 per year greater than in states in which the elected officials do not fight the presence of Unions.
So there is your answer. Also, if you want to see how well it can work take a look at Germany, which I believe is not only the most heavily unionized country on earth, but also the most prosperous. They, the Germans, have better pay, better benefits, better leave policy, better training, and better job retention. Its their Unions that cause this to happen, and we could do the same here by elimination "Right to Work" laws that do nothing but encourage the race to the bottom among the employed.
The Union worker is always better off than her or his non union counterpart, just as a soldier is better off with his unit rather than alone and lost in enemy territory, just as a child is better off in the structured setting of the family or school rather than out on the streets alone, just as an elderly person is better off in the nest of the extended family than homeless and alone. Unions are the second level of human organization, right behind the family and right in front of community governance. We come together in the workforce for the reason that it is our last defense from those who would exploit our every twinge of muscle, who would divide and concur us on the workplace floor.
And those who would fight a union, what are they? They are the slave-traders of older times, they are the industrialists who move operations to China and India, they are the lobbyist in Washington, and they are the right wing Fascists who would trample on workers for the sake of money, money, and more money so long as it lands in their pockets.