The Department of Homeland Security has revoked the collective bargaining agreement for thousands of TSA employees, a move critics argue will undermine worker rights and aviation security.

DHS said that a “select few poor performers” had been taking advantage of the agreement’s family and sick leave policy. DHS’s press release also claimed that nearly 200 officers, out of TSA’s screening workforce of approximately 47,000, work “full time” on union matters.

"Attempting to negate [TSA workers'] legally binding collective bargaining agreement now makes zero sense – it will only reduce morale and hamper the workforce," said Rep. Bennie G. Thompson, a Democrat from Mississippi and ranking member of the Committee on Homeland Security, in a statement on Friday.