I think the Industrial Revolution was more brutal for kids in the textile industry. There wasn't necessarily pay involved, just food and housing for some.
The Oyster shuckers got paid according to their production.

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The smaller kids fit inside the machinery while it was running so they were used to lube, no shut downs.

Much like China today.

Lots of amputees as a result.

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And we waited until 1971 to come up with OSHA