If our workloads were entirely determined by all-powerful managers looking to maximize profits, we might expect, as paradoxical as this sounds at first, to have less on our plates.
The capitalist don't care about the overall quality of what has been produced. If it is possible to extract some profit from this work it is fine for him.
He can compensate the low quality paying less for the worker and keep his profit margin unchanged.
You can argue that "competition" would regulate thin in the long run but this is not what the reality shows. In real world we will see the cartelization and monopoly profiting in an underperformant operation.