> Wage fixing is when multiple companies agree to set wages at a certain amount.
I am not an expert on wage fixing laws in the US, but I came across a class action on wage fixing a few days ago (Ron Brown et al v JBS USA Food Company et al) where part of what was aledged was the illegal exchange of salary data via surveys [1].
> The Red Meat Industry Compensation Survey conducted by WMS on behalf of the Defendant Processors violated the Safe Harbor Guidelines in at least three ways. First, the Defendant Processors, not WMS, collectively managed and controlled the annual Red Meat
Industry Compensation Surveys. Second, those Surveys often contained information about the Defendant Processors’ future compensation plans and practices. Third, Defendant Processors had extensive discussions about the Survey results, including at in-person meetings, during which they disclosed their respective compensation rates, practices, and plans
[1]: https://www.classaction.org/media/brown-et-al-v-jbs-usa-food...