What do you think about representative vs direct unions?

Representative unions' incentive seems to be gathering the biggest bloc of members to represent, with their dues and bargaining power focused into a few union bodies for maximum leverage. This seems to be virtually all unions in the US.

Direct unions - perhaps more accurately works councils? - seem to exist out there, but more in EU - just from what I can read, not firsthand.

The huge unions enjoy more dues but the common denominator definitionally has to be substantially lower than smaller works councils to get the membership counts. Big general unions benefit unions themselves, while smaller unions specific to a company or protecting a professional standard benefit the skilled or specialized workers. Unfortunately, there doesn't seem to be much of a marketplace in the US around that choice.