Americans want to join unions. The supreme court doesn’t like that | Moira Donegan

Court's new ruling makes it harder for workers to join a union, easier to break one and riskier to try to force concessions

Their contract had expired, so the local teamsters, drivers of concrete-mixing barrel trucks for a firm called Glacier Northwest, in Washington state, decided to walk off the job. Like all strikes, the point of the work stoppage was to inflict financial consequences on a recalcitrant management side: to show the bosses that their employees were united in shared interest and mutual protection and that it would cost them less money to negotiate in good faith and agree to the workers' demands than to continue to fight the union for less favorable, more exploitative conditions. When the teamsters began their strike, 16 of the barrel mixing trucks were full. They drove them back to the Glacier Northwest lot and left them there.

But if you don't mix concrete, it hardens, and becomes useless. If this happens in a barrel truck, sometimes that can cause damage to the truck, too. When Glacier Northwest realized that their teamster employees had gone on strike, non-union workers were able to remove the concrete over the course of five hours, averting damage to the trucks. But they lost the use of all the concrete that had been mixed in those 16 barrel trucks that day.

Moira Donegan is a Guardian US columnist