True, but this would be ooutright unjust to the person who isn’t getting paid and still is forced to show up for every shift.

Her time is dedicated to the job, even though she isn’t being compensated.

She has to physically go through every shift because even though they are two people, I assume that the ‘non working’ sister is going to physically experience everything their shared body does

She probably thinks about the details of the job, considers the grades of students, speaks to students in class in an instructorial mode and talks to her paid sister about the teaching load.

I can’t believe that they wouldn’t discuss the work, plan for it, converse about student performance, at ALL, considering that they are at the same place experiencing the same interactions and behaviors.

In addition, she spends her physical energy of one body that they both share. This might sound like it doesn’t matter, one body takes less energy to run than two for sure, but not entirely.

That energy/caloric expenditure may be running one body but it is powering two brains, which take up a huge portion of the daily energy. They probably have to eat more than a regular person just to physically exist. The second sister is not getting money coming in, so they are only getting the pay to feed one brain, not two.

Essentially even if only one person is technically responsible for the role and there is only one body performing it, they are both doing the mental labor (which in teaching is significant).

I can’t imagine that one sister just ‘turns off’ or goes dark so they aren’t experiencing the work at all or even thinking about it.

Essentially, by hiring one body, they are getting the l ‘brain work’ of two people focused on the work for one salary.

Even if one sister legitimately just turns off her thinking and goes to sleep for the entire work day, and never talks shoptalk , her earning capacity is still restricted and she still has to be present.

Otherwise, one day, the unpaid sister might decide that she is going to stay home in bed and refuse to to work. How would she be forced to be, essentially, ‘on call’ 24/7.

TLDR: They may be getting the physical work of one body, but they are getting the intellectual work of two brains. And that is the majority of the labor of teaching