Their children attended schools especially built for them, and in these schools manual training and applied science were specialized upon.

Thus, and unavoidably, at the very beginning, out of this segregation arose caste.

The members of the favored unions became the aristocracy of labor.

They were set apart from the rest of labor.
They were better housed, better clothed, better fed, better treated.
They were grab-sharing with a vengeance.
In the meantime, the rest of the working class was more harshly treated.
Many little privileges were taken away from it, while its wages and its standard of living steadily sank down.

Incidentally, its public schools deteriorated, and education slowly ceased to be compulsory.