Provide an insight for the article below as it relates to Contract Negotiations and Collective Bargaining

The Service Employees International Union (SEIU) is the second largest union in America, and recently, it has been focusing its organizing efforts on unionizing airport workers at airports that are American Airline hubs. Most airport workers work for smaller contractors, rather than the airlines themselves, and the union seeks to unionize these employees to help raise their hourly wages. The SEIU argues that wages for airport workers have been stagnant for many years near the poverty line, which has disproportionately affected immigrants and people of color. This past Friday, the union was successful in winning a union election at Charlotte Douglas International Airport.

See Ted Reed, "Charlotte airport workers join union that seeks higher pay at American Airlines hubs", Forbes, May 17, 2023