A Boring Dystopia

Exploitation is a bit finicky to define. Unless a laborer gets all of the value of the labor they produce, or they're in a worker co-operative, exactly at point would you define a job as exploitation? Paying the lowest labor cost is just good business sense. Free market allocation of resources has been the most efficient system humanity has found for economic growth. China does have capitalistic attributes in its society, and they are the closest to a "communist" society that exists on the planet. Though of course, regulatory capture, and as it is called in Hamburgerland "too big to fail" corporations, implies that we do NOT have an actual free market, the Gamestop saga being a shining example of this.

So, at what point would you define something as labor exploitation? There are some obvious examples of it (child coal mine/meat processing/textile workers etc), but where is the line?