The reasons those jobs are such shit is also money. A lot of people enjoy cleaning, nobody enjoys being overworked. Normal functioning societies don't leave heaps of stinking trash around, they neatly pack it and the work of a janitor of garbage collector becomes actually enjoyable if you're a proper type of personality. Hell, my uncle right now works as a part time street sweeper basically for free. He has his basic needs met by other means, and his "job" pays him enough to get a cup of coffee before the shift and a sandwich after. He just enjoys making the world cleaner, chatting with locals, taking care of stray cats, and having a routine. All of that is possible in a world that doesn't revolves around squeesing every bit of labour from people so some pedos can buy themselves another island and fill it with sex slaves