I certainly agree with you and would fully place myself behind such efforts to modernize worker/employee/labor laws however the people that would actually benefit from this would be "group-thought" into believing its bad for them. This is why unions in most environments are thought of as old dinosaurs that have outstayed their time. They will do everything they can to keep themselves here while contributing very little to the overall cause of their missions. I know full well that unions have enabled the common-man to have better wages, safer workplaces and fair compensation but I also know how they have hindered many developments of future growth to the same businesses. Unions are no unlike the rest of the world. Environments, culture, people and places all change and eventually need to be looked at again with an open mind.
As long as most people believe that the government or someone else will take care of them they will be glad to be thought-for by others. Since there is no easy way to show long term damage until it is typically catastrophically to late, this trend will likely remain.