What Happened in New York in the Seventies?

Unions are there to protect the rights of workers. But when public money is diminishing, unions go on strike. New york city was completely in debt by 19 72. This caused a global recession because you've got industrial west reliant upon falking ile from south arabia. The white working class workers that were fighting for their jobste blame the blacks and the chicanos and portorecans which leads to union folk and strikes.