Courtesy of Wired Magazine, we can see how the robotic assembly line is scaring the unions. Robots do not require expensive healthcare, pension contributions, or union shop foremen to supervise the relationship between the company and its employees.
It is not so much that the union's membership is in decline, it is the loss of those massive income flows that allows union executives to benefit from their massive investments. If unions were serious about protecting their members, you would be sure that they would not be welcoming illegal aliens into the country and thus dilute the wage-earning ability of their members. Enjoy the two videos as it is a glimpse of a more automated future.