The UAW objects to American car manufacturers having temp workers on the payroll.

The use of temporary factory workers at the Detroit car companies has long rankled the United Auto Workers union, which wants fewer of them and a faster path to full-time status.

Never mind that

Automakers say they need the flexibility that temp workers provide, especially as they manage a tricky and costly transition to electric vehicles and confront the ups and downs of factory production.

Shawn Fain, UAW union boss, is extending his threat to Ford, GM, and Stellantis, the three major American car companies against which he’s taken selective strike action, a selectivity he’s said he’s using to maximize current damage to the companies.

…what the union calls a “stand up strike,” in which specific locals are asked to go on strike at their facilities. The union has said that strategy will give it flexibility in escalating the strike incrementally up to a potential nationwide strike if negotiations do not deliver sufficient progress in its view, and will make it harder for the auto companies to predict its next move.