However, labor unions almost without exception attempt to obtain an unfair advantage in exactly the same manner as the robber barons. They use violence and corrupt government influence to monopolize and prevent competition against their labor. In this manner the wages negotiated by unions far exceed the skills they bring to the table. The result is the union labor was able to demand undeserved wages and drive up the commensurate cost of goods for non-collective labor. In short unions hurt the consumer and the US economy by consuming more than they produced. Much more!
What eventually caught up to the unions was changes in market conditions and Clinton's "Globalization Initiative" precluding them from violently commanding a monopoly on all of the labor in their particular industries. They were forced to compete just like the robber barons had been forced to compete by the enacting of antitrust legislation. They had grown accustomed to receiving wages far in excess of their efforts and were slow to realize the party was over. The unions continued to demand unearned wages and ended up bankrupting their employers. Essentially killing the goose that laid the golden egg. In many cases the companies long held hostage by the unions moved their operations elsewhere as capital has the privilege of flowing wherever it is most efficient.