What collusion are you referring to? There was one case I am familiar with, from several years back, where tech giants had a gentlemen's agreement to not cold call each other's employee AT work to recruit them. It seems to be an outlier, and pretty mild as far as collusion goes. Competition amongst tech employers for workers is actually very intense, which produced the arms race in tech talent and corresponding salary growth over the last decade.

Anyway, my issue is not the collusion, it's the regulatory restrictions, that violate the right of the employer to freely contract. That's coercive.