Those are definitely not unions. They're employees, the groups are small and they're usually managed using a combination of bribes and threats (yes, even though

Those are definitely not unions. They're employees, the groups are small and they're usually managed using a combination of bribes and threats (yes, even though that is illegal). A union does not have these problems because they are so large they cannot effectively be managed in such a detailed way. That leads to a positive incentive to simply negotiate.