Per Statute § 7101, Findings and purpose:
(a) The Congress finds that–
(1) experience in both private and public employment indicates that the statutory protection of the right of employees to organize, bargain collectively, and participate through labor organizations of their own choosing in decisions which affect them–
(A) safeguards the public interest,
(B) contributes to the effective conduct of public business, and
(C) facilitates and encourages the amicable settlements of disputes between employees and their employers involving conditions of employment; and
(2) the public interest demands the highest standards of employee performance and the continued development and implementation of modern and progressive work practices to facilitate and improve employee performance and the efficient accomplishment of the operations of the Government.
Therefore, labor organizations and collective bargaining in the civil service are in the public interest.