The closest thing I can find is,
James 5:4
“Behold, the wages of the laborers who mowed your fields, which you kept back by fraud, are crying out against you, and the cries of the harvesters have reached the ears of the Lord of hosts.”
But I don’t know of any verse that claims the laborers must be paid after the harvest has ended and the work is done.
And just how does one cut jobs *unjustly*?
Are employers expected to provide workers work when there is none?
THAT would be unjust, to the employer.
The Catholic Church here in the U.S. has a very long history of this sort of thing. It hitched itself to the labor movement in the late 19th. Century in order to curry favor with it’s flock, which was largely made up of working-class Catholic immigrants.
Some of their Priests (Detroit’s Fr. Coughlin and Pittsburgh’s Fr. Cox) became media stars spouting this sort of crud on the radio in the 1930’s.