The phrase "powerful unions" refers to labor organizations or groups of workers who have a strong influence, control, or ability to negotiate for better worker rights, wages, and working conditions. Full definition
It's one of the most powerful unions in the five boroughs. (bronxnewsnetwork.org)
You probably won't be surprised to learn that the most generous plans are typically found in a few industries with powerful unions and in the public sector. (moneysense.ca)
It is true that collective bargaining agreements and powerful unions protect poor performers in too many districts. (b4njkids.org)