[debouncy]

If unions don't aren't somewhat mandatory then workers are trapped in prisoner's dilemma.

[erik_seaberg]

The prisoner's dilemma is modeled with only two sides. A union might be better for average members, but it's strictly worse for non-members and employers and customers. Competition is a solution, not a problem to be avoided.

[sukilot]

Yes. That's an argument against libertarianism, not an argument that libertarianism must include mandatory unions.