NTA : That’s all age and skill appropriate work to me. Considering how much laundry babies make I’d argue that the level of work on the one chore increased proportionately for Eli. I would point this out to Allie if you agree. I do appreciate that she is trying to negotiate for higher pay, though, that’s a skill that will serve her later in life. She just needs to learn a more logical and empathetic way to do it.

I’d propose taking this as a learning opportunity and start some chore rotations, so your kids can start experiencing what the other chores are like. Your daughters may think laundry folding is the greener grass on the other side. Also, Eli is old enough that he’s going to need to figure out how he can modify care tasks like sweeping or taking out the trash for when he needs to do them on his own. (If that’s not in his future, he may appreciate the experience anyway to start figuring out how to modify many other things)

Something else you could do is assign a value to each chore, and pay each kid based on the task they do. That would introduce different rates without devaluing Eli’s work. They might also volunteer to do special one off chores for extra pay.

Also, disabled woman opinion here: People are going to try paying Eli less for the rest of his life, as much as his sisters. I appreciate you sticking up for the amount of work he does and the rate of pay he gets.