Public unions have a conflict of interest. The unions use their money to get Democrats elected to office, and those Democrats who get elected, will be the ones bargaining with the unions. Is it a coincidence most big union cities/states are run by Democrats? Even President Franklin Roosevelt was against public unions, and it was not until President Kennedy, with an executive order, who paved the way for public unions. There is nothing wrong with private unions, but public unions, who bargain with our tax money, do not have the automatic right to form a union. It is up to the people who elect our public officials.
Also, as someone stated earlier in a post, the NLRB, who is fighting Boeing with the move of a plant to South Carolina, is way out of bounds. It is up to the private company where they want to do business, not the federal government. Just as companies can get to greedy, the same thing can happen to unions. And you can see the current results in the North, while at the same time, seeing companies such as Nissan, Toyota, BMW, etc. building plants in right to work states. The employess in right to work states are getting justly compensated, while at the same time keeping their jobs.