The Pajama Game (1957) on Netflix

Myron Hasler, Vice-President of the Sleeptite Pajama Company, hires Sid Sorokin, new to town, as the company's new factory superintendent, with who the union workers on the floor will have to deal. Sid, in negotiations with the union, primarily has to deal with "Prez", the union President, and Katie Williams - Babe to her friends - the chair of the union's grievance committee. Babe does her union job well as she can tell how legitimate her member's claims are and how hard to push for them against management. Despite their professional management-union struggles, both Sid and Babe are attracted to each other, something that Sid is more willing to recognize than Babe. But their professional lives and their personal lives may not be able to mix, especially as the union has an outstanding grievance for an across-the-board 7½¢ per hour wage increase, which would bring their wages in line with the industry standard. Despite the company doing good business, Hasler has thus far refused them the raise, blaming the Board of Directors who have to approve it. This standoff could ruin any chance of a personal relationship between Babe and Sid, unless this problem is resolved, which doesn't look like will happen without drastic measures on one or both sides.