Under capitalism, a lot of the time, highly dangerous jobs are also highly paid. Kind of a balance that the individual decides to engage with. Same idea behind getting an advanced degree in STEM or law. I think of my job by example, I’m a power plant operator at a large combined cycle plant. No fucking shot I’d be doing this if the pay wasn’t good. I’m around explosive and deadly hot shit all day.
So, a cast system…
It’s spelled “caste,” and castes are (critically) hereditary. Leaving a caste you were born into is virtually impossible.
People who do more/harder work can get compensated an appropriate amount. Note that this runs at odds to the current system where a CEO makes 1000x their employees salary despite not working 1000x as hard.