Why does labor follow that rule?

Isnt it true that some goods are uneffected by price changes? Because they are necessities? If thats the case, labor could follow that rule instead. Labor is a necessity to business, and gets replaced very quickly when it isnt.

There wasnt a minimum wage during the industrial revolution, yet tons lost jobs as they were replaced by machines. Thats gonna happen again as soon as labor isnt necessary. But the fact is, you cant sell burgers unless you have someone flipping the patties.