Postal workers on strike in 1970. The last straw was a belated 4% raise for the workers, alongside a 41% raise for members of Congress.
This was the first time that government workers had gone on strike, and they were devastatingly effective. The workers delayed the draft and the census, and gained collective bargaining rights. The capitalists have been sore ever since; that’s why they’re pretending that the Post Office loses money and needs to be privatized.