From the article.
"The VW workers allege that a prior "neutrality" agreement between the company and UAW regarding the election violated the National Labor Relations Act because the union gave "things of value" in exchange for the company making it easier to organize its Chattanooga workers. Essentially, the complaint argues that the union bribed the company by offering it favorable terms for an eventual contract — a situation that would benefit the union leaders and the company, but not the workers."

This sure seems like bribery