A Great Democracy Doesn't Make

It Harder To Vote Than 

To Buy An Assault Weapon.  

President Bill Clinton

Collective Bargaining
The National Labor Relations Board

Collective bargaining is specifically an industrial relations mechanism or tool and is an aspect of negotiation applicable to the employment relationship.

In collective bargaining, the union always has a collective interest since the negotiations are for the benefit of several employees.

Where collective bargaining is not for one employer but for several, collective interests become a feature for both parties to the bargaining process.