<Ul> <Li> including the Works Progress Administration ("WPA") </Li> </Ul> <Li> including the Works Progress Administration ("WPA") </Li> <P> Under section 1 (29 U.S.C. § 151) of the Act, the key principles and policy findings on which the Act was based are explained . The Act aims to correct the "inequality of bargaining power between employees who, according to the Act's proponents, do not possess full freedom of association or actual liberty of contract and employers who are organized in the corporate or other forms of ownership association". To achieve this, the central idea is the promotion of collective bargaining between independent trade unions, on behalf of the workforce, and the employer . </P> <P> encouraging the practice and procedure of collective bargaining and by protecting the exercise by workers of full freedom of association, self - organization, and designation of representatives of their own choosing, for the purpose of negotiating the terms and conditions of their employment or other mutual aid or protection . </P>

What is the purpose of the national labor relations act
find me the text answering this question