Alice and Bob are negotiating an employment agreement. Alice belongs to an organization and gets agreement from her fellows on how much she should offer, and also that none of them will undercut her and try to make a separate agreement with Bob on different terms. Bob goes it alone.
When Alice is a hiring manager and her organization is a company, we call this “how hiring is done thousands of times every day in this country.” When Alice is a worker and her organization is a union, you call it “price fixing” and “colluding.” Why the difference?