Oppression is inherent to capitalism, it requires to create and exploit a bunch of suffering persons without any good option to keep efficiency and to do the most undesirable work for very bad salary, even though it should be worth more given its undesirable.

For example what kind of work?

Work concerning sewage, construction (a lot of the time safety requirements are not met cause employees wants to save money and persons hurt themself in accidents because of that), even being an Amazon warehouse worker without an option to go to the bathroom, etc.